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Boot problem of main operating system

Q: Boot problem of main operating system

EDIT Moved from Am I Infected to XP. As requested in post 22 ~~boopmeMy computer runs XP - Home.Last night I was prompted to update Media Player to version 8. I was afraid to do so, because many "updates" from MS mess up my computer. However, I loaded the update. I noticed the new icons in the tray and on the Start Menu, so I assumed all was well.On Friday nights I run my anti virus and anti spyware software. I started AVG anti-spyware. I checked on it 2 hours later and my boot up screen was on the monitor. By bootup screen I mean, when my machine is turned on, it stops soon after the bootup begins and says something about the Processor was changed??? and prompts me to hit F1 to continue or Del to go to the BIOS setup. I always hit F1 and the machine always bootsup just fine.Something happened while AVG was running to shut down the computer, what I don't know and I don't know if it is connected to the Media Player update or to a virus I picked up the night before (4 of us use this computer, so viruses and adware are not uncommon - I automatically run Norton Anti-virus and manually run AVG, Ad-Aware, SuperSpyware and Lavasoft). HOWEVER, this time when I hit F1 the machine did not boot up but rather loaded my desktop but with NO tray, NO icons and no response from the Windows key on the keyboard, but with only the mouse pointer on the screen. I could get the Task Manager by hitting Alt-Ctl=Del, but nothing else.I rebooted several times, and always the same result: My desktop but no tray, no icons, nothing.I rebooted and tried my wife's and my two daughter's sign in. Same result, their desktop with nothing else. None of us have secure log on procedures and all have Admin Rights.I tried to boot up in Safe Mode. Again nothing.I loaded an old Windows XP CD into the CD reader, changed the BIOS to boot up from a CD and loaded a second XP operating system in a folder named Window2. Now when I boot up after hitting F1 to continue, I'm prompted with which operating system to boot, Window2 is listed first and the machine boots up properly, (This is how I am connected and wriiting this posting.); Windows (the original operating system) does not. I tried to use the Repair option on the CD to repair the original XP; it does not work but prompts me with something like "Continuing Startup", but then it restarts the computer.The original operating system is linked to all my programs, my Firefox, my Thunderbird, etc. I NEED original system to bootup. PLEASE HELP

Preferred Solution: Boot problem of main operating system

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

A: Boot problem of main operating system

Are both of these installations in the same partition?Since you can open Task Manager, Click on the Applications tab and end all running processes.Start a new task and type explorer.exe and OKHopefully, you should have your Desktop back and you can run some tools--------------------------------------------------------The process of cleaning your computer may require you to temporarily disable some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.Please download Malwarebytes Anti-Malware and save it to your desktop.alternate download link 1alternate download link 2Make sure you are connected to the Internet.Double-click on mbam-setup.exe to install the application.When the installation begins, follow the prompts and do not make any changes to default settings.When installation has finished, make sure you leave both of these checked:Update Malwarebytes' Anti-MalwareLaunch Malwarebytes' Anti-MalwareThen click Finish.MBAM will automatically start and you will be asked to update the program before performing a scan.If an update is found, the program will automatically update itself.Press the OK button to close that box and continue.If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.On the Scanner tab:Make sure the "Perform Quick Scan" option is selected.Then click on the Scan button.If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button. The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".Click OK to close the message box and continue with the removal process.Back at the main Scanner screen:Click on the Show Results button to see a list of any malware that was found.Make sure that everything is checked, and click Remove Selected.When removal is completed, a log report will open in Notepad.The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.Copy and paste the contents of that report in your next reply and exit MBAM.Note:-- If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. Note 2:-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs

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Hi all,
Windows 7 Pro 32bit
I have a captured image and I booted into PE on my target system. I used Diskpart:

select drive 1
create partition primary
format quick fs=ntfs label="Win7 32bit"
assign letter="C"

Then I applied the image with imagex:

imagex /apply e:\testimage.wim 1 c:\

The image applied, but now when I try to boot (After removing the PE boot disc), it tries to network boot and gives me the message "Operating System Not Found. I made sure to reset my boot order to HD>removable>CD>Network.
Do I need to manually create a small partition responsible for booting? What steps do I take from here? I was surprised that googling didn't lead me to my specific problem, but mostly problems involving SCCM and large scale deployments.

Thanks in advance,

A:I deployed an image and then tried to boot it, but the system tried to network boot instead and then gave me the message "Operating System Not Found"

In your diskpart,you need to add


To make partition active

After applying image, you need to create BCD environment with:

bcdboot C:\Windows


Drive letter C: is whatever you used in command:

Imagex /apply e:\testimage.wim 1 c:\

If you would use two partition setup as suggested by other posters, then the small 100 MB partition would be C: and the "Windows" partition would be "D:". Hence, you would use

bcdboot D:\Windows

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I have Asus laptop with OEM Win7 HomeP 64bit on it, I installed Ubuntu 12.04 along side with Win7, didn't know that Ubuntu will be the main boot, I used Ubuntu 11.10 a year a go and Windows was my main boot, I tired several way to retrieve Win7 as main boot but didn't work.

I tried to fully recover Windows, but when finished I get black screen with "getgrub error"
now recovery doesn't work any more.

I want to get rid of Ubuntu for ever, how? without losing my genuine Win7

A:Dual Boot problem, Ubuntu is the main boot

Hello, Mesh F90 and welcome to Seven Forums.

First you to boot to Ubuntu 12.04 and follow this :

1. Open your Terminal.
2. Type grep menuentry /boot/grub/grub.cfg
3. You will got something like :
menuentry "Windows 7 (loader) (on /dev/sda1)" {
You will got other lines but you need this, this is last one.
4. Remember this quotes for Windows 7 (ex . "Windows 7 (loader) (on /dev/sda1)") (DON'T FORGOT quotes!!!) you will need it later.
5. In Terminal type this : sudo nano -B /etc/default/grub
6. You will got this :

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.

GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
.... you will have more ....

7. Change GRUB_DEFAULT to value for Windows 7 from menuentry (you remembered it ) (ex. GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)") (DON'T FORGET quotes).
8. Press CTRL+X and type "y" (without quotes) to save it.
9. Important step! Type in your terminal : sudo update-grub
to save your changes

That is all and Windows 7 will be default now.


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Dell XPS 600 Plentiun D dual core 3.0 ghz 800 Mhz
Mother Board Dell 0xh241
Bios A09 Suppports cd-rom boot,supports selectable boot,supports ls-120 boot
Firmware 108.108
Nvidia 7900 gs video card
cd-rom atapi
dvd atapi
Hard drives sata

I am trying to boot a Linux distro which is on a dvd disc.
The boot sequence in the bios is set to cd-rom first, sata hard drive second, floppy drive third and ide harddrive is the fourth position.(presently not used)

When i insert the dvd disc in the drive and boot the computer the c:\ drive is booted.
I can change to 40 conductor ide cable from the cd-rom to the dvd being the first position on the ide cable and it will boot.

This XPS case is bulky and it is inconvient to continually move and open to swap the ide cable back and forth.

How can I have both ide drives boot without changing the cables position.

Thanks for the help

A:Dvd will not boot Operating System

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About 3 weeks ago my computer quit booting into XP. I thought it may have been a power failure corrupted the hard drive.(We had one cause all the clocks were flashing) So I went through the task of format and reinstall of XP Pro.

Today I went out to start my computer and it was doing the same thing. (I got into the habit of turning off my computer when not using it now. So it was off.) It pops up the screen thats says:

Windows failed to start. ect, ect ect, Select what you want to do, ect ect ect

safe mode
safe mode with networking
last know good config
start normally

No matter which option I select, it returns to this screen. So, what would be the first thing to look at?

something else???

I have a complete image of the drive (backups incase of a crash) so if I am unable to recover I can get back 99% or the info without problems.
Thanks for the help.

Here is my system info:

CPU: Intel P4 E Prescott 3200MHz
Motherboard: Asus p4p800-E Deluxe
Memory: 4096 MB of OCZ 4 x 1024 mb PC3200
Video Card: Sapphire Radeon 9250 Radeon
Hard Drive: 2 Western Digital WD1600YS 160.0 GB @ 7200 RPMS in raid1
Monitor: HANNS-G JW199D
CDR/CDRW Manufacturer & Model: Plextor PX-W1610A
DVD R/W: Nec ND-3520A
Storage Interface: SATA,SATA-RAID
Sound Card: onboard sound
Speakers: Altec Lansing
Internet Connection: verizon xDSL @ 3Mbps/768Kbps
Operating System: Windows XP Pro Sp2
Other Components: Power supply - Fortron AX450-PN
Enermax UC-9FATR12 Fan control / ... Read more

A:XP Pro won't boot to Operating System

Try running chkdsk from the Recovery Console.Insert the Windows XP CD into the CD drive, and then restart the computer. Click to select any options that are required to start the computer from the CD drive if you are prompted. When the "Welcome to Setup" screen appears, press R to start the Recovery Console. If you have a dual-boot or multiple-boot computer, select the installation that you must access from the Recovery Console. When you are prompted, type the Administrator password. If the administrator password is blank, just press ENTER.Type: chkdsk /rIt's important to have a space before the "/".To exit the Recovery Console and restart the computer, type exit at the command prompt, and then press ENTER.

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Okay so here's the deal...my original configuration was as follows:

I had Windows 7 and Ubuntu installed, Windows 7 was installed first and then i installed Ubuntu into program files. Anyways i wanted to install MicroXP also so i could boot into xp if ever needed. Well i went through the install for xp and changed the directory to e:\microxp\ instead of e:\windows\ which is where my windows 7 files were installed.

Anyways now that xp is installed that is all i can boot into...i cant boot into ubuntu or windows 7. I installed Acronis OS Selector and that wont pick up any of my other operating systems except for windows 7.

Well my question is, all the files are still on my hard drive for windows 7, like i said i installed windows xp into a different folder. Well is there anyway to setup windows 7 and ubuntu in acronis os selector? They are all installed on the same partition but now it only boots into xp. Is there some way i can uninstall xp and get back what i had before?!

Please help i can't use my computer at all!!!

Thanks guys!

A:HELP Can't boot into operating system?

I found a fix:http://windows7forums.com/windows-7-suppor...t-ini-file.htmlIf that doesn't work for you use Windows 7 CD and click on "Repair my Computer" and unlike XP, 7 will detect everything and do it for you!

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I recently started my computer and it gave me the message "Missing Operating System"

A little background of the problem. My hard drive had some weird problem where every once in a while, maybe once a week/month it would stop getting detected in the bios. If that happened while the computer was running it restarted the computer.

That happened and I checked the bios and the sata hard drive was not detected. What I usually do in this situation is close my computer for a few minutes, then start my computer up again and it gets detected in the bios. So windows screen pops up and it is loading. But I though it was taking too long on the loading screen so I pressed the restart button on my computer. After that happened, I got the "Missing Operating System" error.

My Sata hard drive is still detected in the bios.

Steps I have tried:

1. Changing Sata port
2. Windows Vista Startup Repair
3. command prompt chkdsk /f and /r

A:Missing Operating System on boot

I finally fixed it after doing a bootrec.exe /fixmbr and then bootrec.exe /fixboot

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When I boot my machine I get the message: "Missing Operating System"
I checked in the BIOS and the Hard Drive is still listed. I also tried using the Windows 7 Install disc to repair the boot sector/record but that too didn't help. It said it was fine, so just in case I used the command ?bootrec.exe /fixmbr?.
Can anyone tell me what the problem is?

A:Missing Operating System on Boot

Are you sure you dont have a usb drive plugged in somewhere that the machine is trying to boot from and failing?

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I just set up a Crucial SSD and it was working fine. The HDD had 7 on it previously and I couldn't format it for some unknown reason--couldn't get rid of the 100 MB partition, etc. Made it Dynamic in frustration and that really messed me up.

So I took the HDD out and put it in an XP computer, so I could format it. While doing so I booted the SSD and didn't notice a problem and, again for some unknown reason, it booted from a CD with the SSD Firmware update. I'm positive this is a Linux boot. When I saw it it was asking yes or no and I said no and it quit with an A:\ prompt! Does that sound like Linux?

So now when I boot windows, after re-doing a clean reinstall of 7, the BIOS does it's thing and ends with the AHCL line. Now here comes a line in the top left of the blank screen saying, "Loading operating system..."
Then it goes to the Starting Windows screen.

This "Loading operating system..." shouldn't be there and is not causing any real problem but it is annoying.

Anyone know how I can get rid of it?

A:Loading Operating System... at boot-up

The first two questions I would ask are: is the SSD's firmware completely up to date? Is the BIOS up to date with the latest non-beta version?

Also, what is the boot order that you currently have setup in the BIOS?

What mode are you running the drive in (AHCI/IDE)?

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I had to install XP Home on a friends system, which previously had XP Pro installed. Installation went fine. Deleted the XP Pro patition prior to...Only problem...After booting I'm prompted to choose operating systems Pro vs. Home. This is the only part of XP Pro left, no partition, etc. I tried FIXMBR and it detected a problem and said it fixed it, but it still prompts me to choose operating systems after booting.

Thanks in Advance, dm

A:Choose operating system after boot...

oh some machines do that for no reason i could figure. I can find out a fix for this (there is one i remember ) if you want me to. But since it is not actually there you can feel comfortable and just ignore it. To disable the operating system display screen simply right click on my computer - properties - advanced - start up and recovery settings - and uncheck the box next to time to display the list of OS . You wont ever see it again :)

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I brought a thinkpad got it straight out of the box charge the battery, turn it on and got this message operating system could not load critical driver missing out contains errors what does this mean and how can it be resolved.

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Hi guys, i have installed two operating systems in my computer. Windows xp(hard-disk 1) and Windows 7(hard-disk 2).
I have two hard disk, I have installed Windows xp on one hard disk and windows 7 on another hard disk..
Recently My windows Xp got corrupt so i re-installed Windows Xp. After installing Windows xp, i'm not getting the option to choose which operating system i want to boot, Earlier i was getting the option to choose between Xp and Win 7, after re-installing my XP, i'm not getting this option, it just directly boots up Win Xp, Can any one help to get these option to choose between Xp and Win 7.

P.S. Win 7 is still installed on the 2nd hard drive.

A:Need help..Multiple Operating System/Boot ?

Download EasyBCD from here -


Then you can read about how to get the W7 bootloader back (see:Setting Up The Dual Boot) here -


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Hello! I think someone here can probably help. I just joined this forum today so I'm not sure if I'll know how to retrieve your messages. My email ...(Removed by mod) just incase you don't hear back from me. Thanks!

Anyway...this is an old PC that I had upgraded to XP Pro and had no problems with it but I bought a laptop and quit using this PC. I got married in 2008 and was planning to get some files and pictures off of it. FAIL.

Today I just tried again and it is doing the same thing, it says "Operating system not found on any devices. Press any key to try again."

I've done that several times and I've tried pressing f5/f8 on startup. Control/alt/del nothing...

I don't know where my Windows XP Pro CDs are.

The only think I have are System Restore disks for XP but those came with my laptop.

I don't want to lose what's on the tower...do you think there's anything to get it to work?

Thanks so much for any help you can offer!


A:XP Pro will not boot Operating system not found


Firstly make sure nothing has bumped the PC and knocked a cable out of place by opening up the tower and checking the hard drive cables are in place still (just in case) secondly if you don't have any XP cd's then you can still get your files off of the hard drive by downloading another operating system called linux which can boot from cd in order to transfer the pics you want to a USB flash drive or something. Follow this tutorial on how to do that (burn the ubuntu cd on your laptop)

Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer - How-To Geek

hope this helps


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I have a laptop with window XP professional installed on it. Now, it tells me in the upper left hand corner of a black screen that the operating system is not found. I am lost.

A:operating system not found/no boot

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I just recently built a system. I have two hard drives in it. I put a 64 gb SSD and my old 320 gb HDD in it. The 64 gb has my Windows 7 Ultimate on it, and the 320 had my old windows 7 Professional on it. When I turn my computer on, I have two choices for Windows 7. How can I just make that screen show the one on my SSD? I don't care about my information on my 320 gb HDD, I just want to boot directly into the SSD.

A:Two Operating System choices before boot?

If Windows 7 has not been removed from the 320 GB HDD, disconnect it, reinstall Windows 7 onto the SSD, then reconnect the HDD and format it using Disk Management -
START | type diskmgmt.msc

Regards. . .



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hi everyone i just build my pc and was trying to install the xp homedition to my pc it went into partiton mode?? and started very slowly partioning my hard drive than stopped at 66% i had to shut it down (restarted) it now it syas operating system failure or there isnt one or something like that had to plug in old computer to get help.

A:operating system boot failure?

if you boot the XPHOME CD and try to delete the partitions on the HDD and then set up partions and reformat and reinstall

Otherwise you could use the HDD manufactures software to reset the hdd

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Starting out straight with the point, without the "how" for now - I had no issues of this sort before but now, after the POST BIOS at the screen that searches where to boot from, I get this: Verifying DMI Pool Data...NVIDIA Boot Agent 249.0542 Copyright ? 2001-2005 NVIDIA Corporation Copyright ? 1997-2000 Intel Corporation PXE-E61: Media test failure, check cable PXE-MOF: Exiting NVIDIA Boot Agent. This loops for about 5 times and finally, underneath the last sequence, it says the following:DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER_ I figured that the Operating System got corrupted for reasons that I'll explain afterward, so I decided to try and do a Windows Repair using the disc. All was good and well until I actually clicked on "Repair your computer" and no OS was listed in the System Recovery Options where it said "If you do not see your operating system listed, click Load Drivers to load drivers for your hard disks". That wouldn't help considering I never had to install any drivers for my hard disks. All my hardware is 3 months old and just a month ago, I ran stress tests on everything possible, memory tests, along with many other tests to check my system (including MemTest86 & Prime95). Including the stress test, I also checked all the blocks on my HDD for errors at the time so it isn't the problem. Anyway, if I did in fact press "Load Drivers", I was able to see all the files on the drive. Along side t... Read more

A:Operating System Boot Failure

First I would run a bootable diagnostic from the manufacturer of your hard drive. You can find links to the most common one's here: http://www.bleepingcomputer.com/forums/t/28744/hard-drive-installation-and-diagnostic-tools/

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hello, i have a windows XP Professional SP3 system, and the hard drive was partitioned. in the second part of my hard drive i had Vista Ultimate that later on i replaced for Windows 7 Beta. i decided not to have windows 7 and instead keep the second part of disk for Data. but the problem is i can't delete windows 7 from the initial boot. "choose early windows operating system" or "windows 7" i tried editing the Boot.ini inside windows XP but it doesn't show "Windows 7" boot. (i formatted the second partition as extra details)

thanks for any help obtained

A:Delete boot second operating system

Vista uses a different boot manager than boot.ini. I've only played with this once, and from what I read manually manipulating that file is a bear.. You might try EasyBCD to edit the menu and remove what you don't want.

It's been a while since I played with the Vista boot manager, but if my memory serves me EasyBCD was the program I used and it was pretty simple.

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Just got a call from my sister away at college and she says this morning she went to turn on her computer and it wont boot, it only displays operating system not found, but it sounds as if the HDD is running. Any ideas, im going to see her this weekend to try and fix. What could cause this to happen all of a sudden? Its an older HP Pavillion AMD 900mHz, dont really remember the rest of the the details, just your basic best buy off the shelf system. Any help would be greatly appreciated.



You have not given any info on the machine eg. O/S. so you could start Here
Since the machine is older it may be Win 98 in which case you can use the same info above but adapt for a 98 machine .

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Hi there,

When I recently added a partition to my harddrive and set it to active, but on reboot all I can get is a 'Missing Operating System'

I can assure that my BIOS are correct and I have them in the correct boot order.

What do you guys recommend I do to be able to boot back into windows 7. I would like to keep my data but if no other options work then I will resort to system restoring.

Also, if possible, is there anyway I could boot something to fix this from a USB disk rather then CD rom.
Thanks for the help

A:Missing Operating System on boot

try to follow the MIcrosoft articles


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I have an Asus G74S. It was working fine yesterday except for being connected to our usual home wifi yet not getting internet. Our other computer, a Mac, accessed it just fine as usual. When I tried to restart my Asus, it only gave me the option to restart Windows normally, which loops me back to the same menu, or enter System Recovery. I tried the system recovery scan 3 times (it took hours each time), restarted between each, and it just keeps bringing me back to the same menu. Perhaps it's because the screen says that it's an unknown operating system.
I can't use a System Restore because the computer says it can't find the operating system and that I need to restart and choose one, though when I restart, it brings me to the same menu and I don't see a way to choose an operating system.
I don't have a recovery disk, but I do have 3 Windows backup disks I burned when the computer was new. I was able to get into BIOS and switch the boot order to load the DVD drive first, but it just asks me if I want to load the disk image, which I don't want to do since that'll erase my files and programs.
The option to choose a system image doesn't automatically detect anything. I have the option to select some drivers. When I open that menu, I can see that my two hard drive partitions (D and E) have their remaining space and files listed, but C is blank. I can open the contents of that backup disk (I just tried the first one), but I'm not sure there are even drivers on ... Read more

A:Unknown operating system, won't boot

I would remove the hard drive...and connect it as a secondary drive on a different system.
I would then try to run the chkdsk /r command on the troublesome partition.  If chkdsk /r reports that it cannot complete (via onscreen error message), please post same.

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I just shipped my computer out of the UK. One of the HHDs my OS was RAID 0ed to broke. Obviously I got a missing operating system error from that. So then I deleted the RAID volume and changed my boot 1st priority to my DVD drive so i could reinstall Windows on the hdd that's still alive at least.
Ok, so I reset the CMOS for the hell of it, bring up the boot menu with f8. Still, it goes straight to missing operating system?
Help me magic computer wizards. I just waited 2 weeks to get my dvd drive shipped to me, and this is what I get. -_-

A:Missing Operating System-Can't boot from CD

Are you sure the DVD you are trying to install from is good (bootable)? Can you check it on another computer?

You can download a legal copy with SP1 integrated from here: Official Windows 7 SP1 ISO from Digital River.
Make sure you get the same version you have, Home Premium, Pro or Ultimate and 32 or 64 bit. Note that Basic or Starter is not available.

I recommend using ImgBurn at 4X speed (or the slowest available) to create the DVD from the downloaded .iso file.

You can do this on any computer capable of burning a DVD.

For techies or folks who work on computers: Create Windows 7 Universal ISO With All Editions Selection On Install with ei.cfg Removal Utility.
This will fit on a 6GB flash drive or can be burned to a DVD.

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Hi guys, i have installed two operating systems in my computer. Windows xp(hard-disk 1) and Windows 7(hard-disk 2).
I have two hard disk, I have installed Windows xp on one hard disk and windows 7 on another hard disk..
Recently My windows Xp got corrupt so i re-installed Windows Xp. After installing Windows xp, i'm not getting the option to choose which operating system i want to boot, Earlier i was getting the option to choose between Xp and Win 7, after re-installing my XP, i'm not getting this option, it just directly boots up Win Xp, Can any one help to get these option to choose between Xp and Win 7.

P.S. Win 7 is still installed on the 2nd hard drive.

A:Need help..Multiple Operating System/Boot ?

When you formatted and installed XP, it probably overwrote/deleted the boot information for W7 on XP`s drive and therefore XP doesn`t `see` it any more.

Maybe a techy guy could jump in here and advise but I reckon if you ran a repair on W7 using the installation disk, that should put the boot info back on the XP drive, giving you the option of either OS.


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Quick question, have got a friends laptop, giving off error "operating system not found". I took the HD out and put it into a caddy, but I couldn't get any PC in my house to pick it up, so I assumed the HD might be fried totally. But put it back into laptop and tried to boot Win XP from the CD drive and try a re-install. Not when I try to boot from the CD all I get is the "operating system not found" error.

Have googled and some people have resolved issue with new HD but any other suggestions?

BTW: Can't get into BIOS, is password protected and the owners don't know it.

A:Operating System Not Found and then won't boot from CD

You need to get into the BIOS and change the boot to CD first. Or, you could wipe the drive in another machine (but it has to be recognized) and it should then boot from CD if the HD is blank.

But if you did everything right and no other machine "saw" the drive, it is probably dead.

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My wife used her netbook after the anti-virus subscription expired and apparently got infected. The unit will not boot. It attempts to boot in last known good setting but then quits right about the time it normally starts. Even if there is something I can download how can I get it into the machine. can I use my working unit to fix my broken one, and if so how.
Looking for help!

A:my operating system won't boot on netbook

Hello ogr8one,what is the Opeeating System?
Did you notice any particular malware,by name.

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I "had" windows 7 on and then i "Shrunk my main "C" drive and created a 50GB space and formated it as ntfs with the drive letter as A. I installed windows xp home on it. and now when ever I turn on my computer it automaticly boots the A drive "XP". How do i get it to boot from the C drive?

I can still acces he files on the C drive bt like i said i can't boot from it.

A:Won't boot correct operating system?

I think you need to eliminate the Vista bootloader, which took over with the install of Windows 7.

Since you only changed the size of that partition, rather than deleting it...it's still recognized by the Vista bootloader (installed with Windows 7) as the default bootable partition.

I used Easy BCD to get rid of mine when I removed the Win7 beta from my system, using the Add/Remove Entries button.

The Vista bootloader supercedes the XP bootloader when Windows 7 is installed on a system.


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So heres the beginning.
This is an hp laptop with windows 8 installed and grub hacked up to boot when I hit boot from cd drive.
Grub wouldn't boot so I tried to repair it with my super grub disk.
But I accidentally hit the win > !WIN! + MBR

Now windows won't boot.
So what I do is I boot my windows 8 disk into command prompt advanced repair.
I then run bootrec /Fixmbr
bootrec /Fixboot
these return succesful.
But when I type in bootrec /rebuildbcd
I get system device cannot be found
(or something like that)
It detects windows on C:
but throws the error
(I have 8 partitions, 2 linux, 1 windows, 3 stock recovery/hp/windows boot(128 mb), 1 swap, and one for extra data)

So my next option would be to install windows 8 to some unused space (I have 30 gb unformatted)
And apparently it won't install to a gpt disk.

So then since I can use my super grub 2 disk to detect operating systems I can boot into Ubuntu (LInux 3.13 rc1 )

So I can type this but when I try to boot into "windows vista" from the detect OS option it says Something about boot configuration data being corrupt or unreadable. /boot/Bcd
All of the files are in the /boot folder as they should be.
But it just won't boot to 8.
I currently get Operating System cannot be found when I try to boot regularly.

So what im looking to do is use my copy of easybcd.

It says it supports win pe with .net 2.0 but where can I fin... Read more

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I made the mistake of putting W7 on a small partition of the 160GB D drive. I was not aware that much of windows 7 programing would not allow me to change the destination to install and insists on installing on the OS drive. I am looking for a way to copy, move or coerce all of the current system onto another drive without erasing that drive.

A:Copy Operating system to another boot drive

A long time ago in a land far far away, while running XP Pro, I installed two identical Seagate hard drives and made them a raid pair. After running for a couple of years, one of the hard drives took a dive. I was able to determine the faulty drive and with some help from "Bleeping" able to reconnect the good drive and use it as drive C: with a little adjusting to the system and some loss of information on the drive. I was able to retrieve most of the information from the faulty drive, but was never able to integrate it back into my system. My system just refused to recognize the drive. Whenever I connected the drive into the system, the system usually slowed down to the point where it took many minutes to start if it actually did, normally it just hung starting. Recently I was using the W7 system and found that it would actually start with the second SATA drive if I set the drive sequence correctly in the BIOS. Once I was able to access the drive normally, I formatted the drive. I am not sure if the problem is with the drive or if it still sees it's self as part of a raid.Now if I start the computer from an off position it will normally recognize the SATA drive designated as G: and some time it will recognize the drive when restarting, today it was recognized and after running for several hours it fell off the computer list. I am running a dual boot system with WINXP and W7, because of a hardware malfunction while trying to upgrade my mother board, I currently ... Read more

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I am giving my old system to my daughter but it is set up to dual boot between Vista and 7.

How do I delete Vista and leave the system with just windows 7 installed?


I personally would before giving my old system to my daughter, a nice clean install.
To clean install:
1) Clean the HD Drive, using Step one in this tutorial:
SSD / HDD : Optimize for Windows Reinstallation
2a) clean install with the OEM manufacturer's Recovery Disk.
2b) Clean Install Windows 7

2c) UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

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Laptop won't start correctly goes to boot menu. I can access system recovery options with win7 cd/dvd.

*Tried windows 7 64 bit cd - won't repair computer
in the system recovery options: no operating system is displayed

*won't let me restore using a system image - won't access the hard drive at all

*has option to load drivers, the following show on my computer
Boot(x: ) 31.1 MB free of 33.5 MB
CD Drive(D: ) Windows 7 CD
Which drivers do I need?

At the system recover Options screen the following displays:
System Recovery Options
Choose a recovery tool
Operating system: Unknown on (Unknown) Local Disk

I tried command prompt


i entered command "diskpart" the following displays:
Microsoft DiskPart version 6.1.7601
Copyright ..............

next command i entered "list volume" the following displays:
Volume 0 D GSP1RMCHPXF UDF DVD-ROM 3167 MB Healthy

Here is where i am stuck, the hard drive C: is not showing up. I need to recover the files on this computer even if i have to do a full re-install of Windows 7 afterwards. Please let me know if further info is needed. Thank you in advance for your help.

A:computer won't boot, no operating system found

Hello MonkeeMadness. Welcome to the forum.

Can you see the hard drive listed in BIOS?

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So, my computer was working pretty good, i shut it off one night. When i wake up, it gives me the "missing operating system" message. I take it to the shop, they need a VISTA disc but said all theyre gonna do is reinstall the OS so i took the comp back.

Burned a Windows 7 disc, and put it in the drive (btw, this is a practically new Hard Drive, purchased last year and not used since).

Now when i turn it on, it just gives me a "Press any key to boot from CD or DVD....missing operating system".

What do i do?? Thanks a bunch

A:Press any key to boot from cd or dvd.....missing operating system.

Well, you ccan get a copy of the Vista recovery disc and fix this on your own. Go to this link http://neosmart.net/blog/2008/windows-vista-recovery-disc-download/

It is a great blog.

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Hi all....

I had windows 7 on my computer...I made a new partision It was the:D Drive
Then i put my xp disk in to the computer. then I turned off pc..
Installed xp on my partision :Ddrive...Xp installed and it was working :)
..But when i turned off my pc and turned it back on it just booted to xp and i did not get to choose if i wanted xp or 7 to boot from:cry::cry::cry: Anyone know what i can do Plzzzzzzzzzzzzzz??.....I would do anything lol...



A:(NeedHelpPls)Cant choose operating system at boot

Hi Finnian.. Welcome to the forums!

You always install the older OS first (XP) then Windows 7..When you install 7, be sure to install Windows 7 on a different partition/drive... I hope this helps..

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I have a problem with my main computer.

I had my computer running fine all today and we turned the computer off as normal before leaving the house. When we came back home, I went to start my computer and it loaded as normal until the part were the windows logo would normally appear. The mouse cursor appeared as but that was it. The screen remained black and the operating system never loaded.
I tried to re start my computer and this time boot into Linux as I have the hard drive partitioned with the WUBI program for Linux. It also would not boot.

I then re started and booted into safe mood into Windows and in there I ran an AVG virus scan and it said there was no infection. I checked my hardware and it all reported as working as normal.

Lucky that I have several computers to even ask this question. Thankful for that. I have tried the computer several times and it just goes into black screen after the windows loading bar and the cursor appears.

I am running Windows Vista ultimate 64 bit and Linux Ubuntu.
It would be so great if anybody here would be able to help me.

Thank you for your time and I hope I have explained this correctly.

A:operating system wont start during boot

Hi, reboot to safe mode then select "last known good" see if it boots ok. If not boot from the Vista dvd and select "repair my computer" select the "startup repair see how you go.

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Hi, my computer crashed last night and when I have tried to switch it on since it gives me the above message.

I have tried entering setup by pressing F2 and changing the hard disk to be the primary boot device, but the same thing occurs.

I have created a Windows 7 32-Bit recovery disk by downloading the iso file on my dad's pc and burning that to a dvd. I am able to load this, but

when it first starts up it has a table supposed to list operating systems but it is blank and I cannor select anything. It says if my operating system isn't listed, "click load drivers and install drivers for your hard disks" but I don't know where on earth these are located and neither does google seem to.

then working through the option on the menu:

-if I click start-up repair it tells me "startup repair cannot repair this computer automatically"

-if I click system restore I get an error message saying I must specify which windows installation to restore

-if I click system image recover it gives me an error message saying "windows cannot find a system image on this computer" and if I try to select one none appear.
Any idea of what I can do now?


A:Boot from AHCI CD-Rom: Operating System Not Found

Oh and also on the startup repair diagnosis and details it says amongst other things "Root cause found: MBR is corrupt". Sounds ominous.

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Hey guys,

So I've done a search on this and haven't found much help. The help I did found and tried.. didn't work.

A little background:

I have an ASUS laptop M51Aseries with Vista on it. The thing was way too slow and it had too many viruses on it. Plus I don't like vista. I decided to install Windows XP on it. I checked ASUS' website and saw that they have drivers for XP so I decided to go ahead with it. When I first put in the winxp CD, it wouldn't boot at all. If I didn't press a key, it would just restart (boot order is set to CD first then HD). If I did press a key, then it hangs.

I did some search and found out about KILLDISK where it wipes off the entire HD.I did that to the VistaOS disk last night (keep in mind that killdisk booted fine!), and now when I try to boot from CD it does the same exact thing. If I don't press a key, it'll just restart and try to boot again. If I do press a key, it says:

Press any key to boot from CD... Missing Operating System

There are a couple other partitions like RECOVERY and some DATA I have on ASUS. I haven't deleted those yet.. Just the VistaOS part. Kind of lost. Any help? Should I delete all partitions and start fresh? Would that work?


Genuine Windows Vista® Business,
Duo T5800
3GB memory
250GB HD


A:Press any key to boot from CD... Missing Operating System

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Hi guys,

So normally I'm quite good at this stuff but this ones got my stumped.

So I created a Windows 7 Bootable USB on Ubuntu using 'YUMI' The USB was formatted to NTFS and ISO loaded on using Yumi. I am able to see all the files on there on the Ubuntu Explorer however when trying to boot from USB at boot I just get a quick message saying 'Missing Operating System' then it carries on booting into Ubuntu....

I've tried formatting the drive as both FAT32 & NTFS.


A:Missing Operating System 'Windows 7 Boot USB'

Forgot that I said anything... I use the tool Rufus to put the ISO onto the USB drive. For some reason all the other tools I used did not work.

You can download Rufus here: Rufus - Create bootable USB drives the easy way

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Hi all,

Switched on the main PC tonight and got a
'Error Loading Operating System' message.

The machine runs XP Pro SP3 and has all updates applied. Itwas last used last night with no problem.

I have tried to run from Bootable Cd's/ DVD's and Floppies but still get the same message.

The Machine is running PhoenixBIOS Ver 4.06 Rev 1.07.1521, This reports that IDE DRive 1 is a ST340014A-PM and IDE Drive 2 is a SAMSUNG SV0432A 010-(PS). However on attempting to boot only the DVD RW drive is shown and no others

I have tried altering the Boot sequence in the BIOS so that Cd is tried first, then floppy, then Hard drive but with no success. You see a brief flash of text saying a bootable cd is detected and then straight to the Error Loading Operating System message.

Any help gratefully received!!!


A:Error Loading Operating System and cannot boot from CD/DVD


Originally Posted by Emlyn

Hi all,

Switched on the main PC tonight and got a
'Error Loading Operating System' message.

The machine runs XP Pro SP3 and has all updates applied. Itwas last used last night with no problem.

I have tried to run from Bootable Cd's/ DVD's and Floppies but still get the same message.

The Machine is running PhoenixBIOS Ver 4.06 Rev 1.07.1521, This reports that IDE DRive 1 is a ST340014A-PM and IDE Drive 2 is a SAMSUNG SV0432A 010-(PS). However on attempting to boot only the DVD RW drive is shown and no others

I have tried altering the Boot sequence in the BIOS so that Cd is tried first, then floppy, then Hard drive but with no success. You see a brief flash of text saying a bootable cd is detected and then straight to the Error Loading Operating System message.

Any help gratefully received!!!


First thing, I'd really REALLY want to know that the boot sequence is adjusted correctly (optical drive first), because if it won't boot from CD, you are looking at hardware problem and not software, which means money AND time, instead of just time to fix the problem.

Try the optical drive with the HD disconnected, and see if something changes.

Try making a bootable floppy disk, and see if that boots.

Also, sometimes when a HD goes bad, the whole cable is bad, so on the chance that it's the slave drive that's gone bad (at least you might keep your O/S intact)... Read more

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I have searched through forums, but could not find the solution to my problem:
I have a notebook ASUS with Windows 8 preinstalled.
Yesterday I was doing some housecleaning jobs with some freeware tool (don't remember the name).
Afterwards I have not been able to boot into Windows.
CURRENT SITUATION: When I switch the PC on, after the welcome screen of ASUS and Windows 8 the system goes to a blank screen (no cursor, no mouse, CTRL+ALT+DEL not working) and hangs.
On next reboot, it does not start automatically the Recovery/Repair procedure and goes through the same steps again. It's not a loop, it just hangs.
Looking into c:\windows\system32\LogFiles\Srt\srttrail.txt I see the following error message at the bottom of the file on the time of my last boot attempt: "Operating system version is incompatible with Startup Repair"
I tried several things without success, so now I want to solve the problems one by one and first thing is to understand what might be causing the "Operating system version is incompatible with Startup Repair" error and how it can be solved.

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Hello. I have 3 Different Windows operating systems on one computer that are across 2 separate hard drives.
My setup is as follows:
1) Not sure if RAID settings will effect anything, but to give as much info as possible...My motherboard is ASUS M3N72-D. This particular Mobo has 6 SATA ports that are all configured as RAID drives. Because of the nature of the motherboard you cannot just assign 2 of 6 SATA connections as a RAID - it's all connections are RAID active or you have no raids at all.
2) One 320Gig SATA Seagate HD is configured solo in a striped array. It is partitioned into TWO DRIVES. One partition has WINDOWS XP 64 and the other partition has VISTA ULT 32.
3) One 640Gig SATA Seagate HD is also configured solo in a striped array. It is NOT partitioned at all. It has VISTA ULT 64 on it.
4) I do not know which OS instance has the boot information on it nor have I ever messed with a MBR before.

I want to:
1) take both VISTA 32bit and XP 64 bit off the 320Gig HD and off the computer, but first make a clone/backup of each OS individually so I can use them on separate computers later - assuming I'll have to manually build the Boot Manager for each which I have no idea how to (a stray puppy I saved and kept decided to chew my computer software CD wallet up so if I delete this HD prematurely I will have to buy 2 more Operating Systems to replace these).
2) then I want to keep the VISTA 64bit installation as my only OS BUT move it to the 320GiG HD that the other tw... Read more

A:Downsizing Dual/Tri-Boot to One Operating System

Post a screenshot of Disk Management. like this:

How to Post a Screenshot in Seven Forums - Windows 7 Forums

make a clone/backup of each OS individually so I can use them on separate computers later

You will have trouble with that - need a special program to restore to different hardware. Unless your Acronis has something to do that. The Paragon program that does it is called Adaptive Restore.

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I have my hard drive partitioned to boot Windows 7 and Kubuntu 10.04. The default operating system is set to Kubuntu but I would like to change this to Windows 7. Any help would be appreciated.


A:Dual boot Default Operating System

Either "startupmanager" or "startup-manager" in synaptic will enable you to set that. A quick google is telling me it's "startupmanager".

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Theres a problem of boot screen There comes a screen to select windows I try deleting with bcdedit /delet but its not getting deleted. I also tried to delete with easy bcd windows application but nothing happened please help.


Microsoft Windows [Version 6.1.7601]
Copyright (c2009 Microsoft Corporation.  All rights reserved


Windows Boot Manager
identifier              {bootmgr}
Read more

A:How to delete the operating system at boot screen.

plz help

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I have XPS 410 with Windows Vista 32 bit. My PC was working fine earlier but yesterday i tried to start it and ended up the message of 'Missing Operating System'. I am unable to login to windows.

As soon as my system boots up, it halts on the screen. This is how that screen looks:

Controller Bus#00, Device#1F, Function#02: 03 Ports, 03 Devices

Port-00: Hard Disk, Samsung SP22304c (this device is controlled by the RAID BIOS)

Port-01: Hard Disk, Samsung SP22304c (this device is controlled by the RAID BIOS)

Port-03: CDROM, TSSTcorp DVD+/-RW TS-H653A

ACHI BIOS Installed
Intel (R) Matriz Storage Manager option ROM v6.0.0.1022 ICH8R

RAID Volumes:

ID = 0
Name = ARRAY
LEVEL = RAID0 (Stripe)
Strip = 128kb
Size = 465.7 GB
Status = Normal
Bootable = Yes

Physical Disks:
Port Drive Model Serial # Size Type/Status (Vol ID)

0 Samsung SP2504C S09QJ1SP***** 232.8GB Error Occured (0)

1 Samsung SP2504C S09QJ1SP***** 232.8GB Error Occured (0)

Press CTRL-I to enter Configuration Utility

Missing Operating System

This is where the system stops and doesn't move any further.

Could anyone please help me that why i am getting this "Missing Operating System" message? How can i log back into my machine without reformatting the HDDs bcz i have very valuable data in it. I dont mind to restore the system provided I can p... Read more

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Theres a problem of boot screen There comes a screen to select windows I try deleting with bcdedit /delet but its not getting deleted. I also tried to delete with easy bcd windows application but nothing happened please help.


Microsoft Windows [Version 6.1.7601]
Copyright (c2009 Microsoft Corporation.  All rights reserved


Windows Boot Manager
identifier              {bootmgr}
Read more

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Whenever i start up my windows 10 computer originally 8.1 its very slow and then it says Boot Device Not Found i have a copy of windows 10 on my usb and cant get it to load windows 10 I really need this fixed soon so if you could help that would be appreicated

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I'm dual booting Windows 8 and Linux Mint 14 right now with GRUB2 as the MBR. I changed the MBR to Windows, but didn't like the menu screen so I went back to GRUB2. Now, when I select Windows 8 from GRUB2, it has the choose operating system screen and it boots after 5 seconds or if I select it. I used EasyBCD to add the boot entry for Linux Mint prior to re-installing GRUB2 as the MBR. Then deleting the boot entry after switching back to GRUB2. I know on Windows XP, you would edit the boot.ini file located in the root of the c: driver, but on vista and later, I'm not sure how to edit the bcdedit.exe file in c:\windows\system32\. When I type the command into command prompt, it displays all the information inside the file, but I'm not sure what command to use to fix the issue.

A:Automatic boot instead of choose operating system

I'm not dual booting but I would assume if you run Msconfig - > boot and set the default OS and Timeout: 0

Startup Options - Change Time to Wait before Default OS Runs

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So the other day I wake up to log on to my Alienware M17x m1, which was running windows 7 ultimate x64 sp1. As it's booting up, I see the message operating system missing. So I grab my USB thumb drive (my cd/DVD drive does not work, thus I have to use windows 7 on USB). Tried to reinstall windows that way, but was getting some partition error of some sort. Now when I try to boot up with USB, I can't even get to the windows 7 installation screen. I get - The Windows Boot Configuration Data file does not contain a valid OS entry. Anyone help please?

A:Can't boot up laptop, operating system missing

Im going to take a wild guess that your hard drive is failing or has failed and that the computer isnt recognizing the drive at all.to replace a cd drive isnt that expensive.i hope you didnt have anything on there that you can afford to lose like pix, music, or important documents. since its a dell laptop you might want to take out the drive and if it hasnt completely failed try to retrieve any thing you can before it goes for good.on laptops the drives are easy to remove and if you have a usb sata/ide connector you can hook it up to a working computer to save the important data.

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