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Missing operating system" error massage when system starts

Q: Missing operating system" error massage when system starts


"Missing operating system" massage is coming when i start my system and i am not able to start. I think because , i had given "mark partition as active" option for one hard dive (E) in disk management when last time i opened. it did not have any data. i did not know, this will make any problem. Now i am not able to boot windows re installation dvd also. i can only take BIOS settings. please any one suggest any way for rectifying this problem ASAP.

Preferred Solution: Missing operating system" error massage when system starts

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: Missing operating system" error massage when system starts

Try disconnecting all drives except for your main drive and powering your system back up.

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Hi all,

Installed a DVDRW drive but comp crashed when installing some software and it stopped detecting my Primary Master and Slave drives. I've fiddled about with the Master and Slave configs and have managed to get it to detect my HD and DVDROM.

I've unplugged my DVDRW and my small HDD and am trying to get windows to load up.

After using FDISK /MBR an rebooting, I get "Missing Operating System".

Tried installing Windows XP after formatting, it seems to have installed but it's not loading.

Current config:

Slave: Pioneer DVDROM (not the DVDRW)
Master: Seagate 80GB (C: = 15GB) & (D: = 61GB).

D: has files on there that I'd like to recover. Too big to put on floppy.

I've run a search for similar problems and tried some of the solutions but no good. Any ideas? Thanks

A:"Error Loading Operating System" to "Missing Operating System"

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I just upgraded from Vista Home Premium to Win7 professional x64 hoping to fix the above mentioned problem. After a complete re-install Im getting the same errors.

Im not sure of the proper terminology here, but during startup the computer does a scan of all hardware and "Volume 0" has a "failed" message.

The odd thing is that sometimes after a few restarts and pointless boot menu visits the computer starts up fine.

I tried windows repair feature by booting from the disk, but when I get to the window where i select the operating system to repair, its empty. Drive C, where the operating system is, is not showing.

I have a feeling that the hard drive itself has gone bad and is very unstable. Please let me know if I'm missing something or we just need to get a new HD.

Thank you

A:Win7 pro startup error "Boot MGR missing"/"Operating System Not Found

What type of hdd do you have. For example if you have a Seagate drive, there is software you can run to do a diagonostic on the hdd before the operating system boots.
This would be a good idea, especially if you were having same issues when Vista Home Premium was installed first.

Do you have more than one hdd installed. If yes, make sure in BIOS settings, the proper drive is selected for First Boot. And better yet make sure its the only drive attached when booting.

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I have an old HP Pavilion 8260 that I got for free which is having some odd issues. Any time I try to boot, I get one of these 2 errors (first it was always Operating System Not Found, now it's Missing Operating System).

Here are the steps I've tried so far: I tried to boot from a floppy with a disk I know works; tried to boot off of the CD Rom; Tried disconencting everything except Floppy, CPU, and RAM; Tried resetting the BIOS by selecting "Set to Default" and by pulling out the CMOS battery (it was after doing this that it switched to the Missing OS error message).

The hard drive is dectected in the BIOS, as is the CD Rom and floppy drive. It properly recognizes the amount of RAM.

I am fresh out of ideas, even though I'm generally pretty good at this. If anyone else has any advice, it's greatly appreciated.

A:"Missing Operating System" or "Operating System Not Found" errors...

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For reference: Acer Aspire v15 Nitro running Windows 8.1

I made a mistake. A friend gave me a USB drive and I wanted to format it, but the USB was actually broken and didn't show up. What I thought was the USB was a drive with a name containing the word "Pushbutton". I formatted it and the computer ran fine until I restarted it. Upon restart, I am getting the error:

"Missing operating system.
No bootable device -- insert boot disk and press any key"

I've been working on this problem for a little while and at first suspected I messed up the MBR. I loaded the windows 8 startup disk on a USB and ran various repairs to no avail (including bootrec stuff in the command prompt).

I have no idea what I did. I know all of my files are still in there somewhere. I didn't do anything to the main disk or partition. I think I formatted some kind of partition that is related to booting up the OS.

I'm not sure if this changes anything, but my hard drive is full disk encrypted using VeraCrypt.

A:Error: "Missing operating system. No bootable device"

I don't know about VeraCrypt, but with MS encryption, you need an extra BOOT partition that is not encrypted. Perhaps that is what got clobbered.

If you have access to another working PC, then you should download the Minitool Partition Wizard Boot CD and make a CD or USB stick from it. To make a USB stick, you'll also need to download RUFUS and use that.

Once you have that, boot your machine and see what partitions are on the drive.

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I thought I would do a 'clean install' of Win 10 on my laptop. Used Killdisk to get rid of 2 of 3 partitions on my hard drive (not the OS partition). I must have done something wrong because now my system will not reboot. All I get is a message saying: "missing operating system". I tried to reboot by: 1) using a 'boot disk' prepared on my desktop; nothing. 2) using my Win 7 disk; nothing.

Then I tapped F12 and tried changing the BIOS settings to boot the DVD drive first. No luck! It appears that I mistakenly wiped the 'recovery partition' and perhaps the 'boot manager'? I dunno.

I can't do anything else that I know. Does anyone out there know how I can get my system to respond to changing the boot order so I can re-install Win 7 and start over again? Thanks for your help.

A:Wiping System to Re-install Win 7 - now "missing operating system"

How did you install 10 flash drive/ cd ?
If you did either of the about you might be able to use startup repair
Startup Repair

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Hey all! I am pretty new to this kind of Win7 issues, so I hope some of you will be able to help. Story goes...

After few hours of gaming the computer died. (It happened right after switching keyboards.) Now, on every setup BIOS(?) comes up with list of options (F2 enter BIOS, F11 boot options, F6 Flash etc.). After that a black screen with error message comes up: Missing Operating System.

I tried rebooting from USB (since I have no disk-drive) and I keep on getting the answer: Error Loading Operating System.

Any ideas?


A:Missing Operating System/Error Loading Operating System

All unlikely, but possible - (a) your HDD died. (b) your bios became corrupted (c) your HDD boot sector became corrupted (d) your HDD partition is corrupted.

Does the drive spin up when you switch on (feel it)?
Check the bios to see if the HDD is reported correctly and is at the top of the boot order.
Find a bootable CD - an OS installer, or create Easeus partition manager bootable CD http://www.partition-tool.com/personal.htm and boot from it. What does the HDD look like with Easueus?

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Ok, I'll start off with the problem.
I have a Windows XP Home system (SP1 installed). It starts off by displaying the manufacturer's logo, and then says the usual (DEL-BIOS, TAB-POST) stuff liek that. This is normal for my startup. Then it goes to the next screen and looks for something to boot off of. 1st in line for booting is the CD-ROM drive. The second boot is the floppy drive. The third boot is the Hard-drive. (Assuming that there is no problem when it passes the first two boot possibilities, it loads the OS from the HD)
So there's nothing in the CD-ROM drive or the Floppy drive-so it decides to boot from the HD. This where when I get the error message-
"Error loading operating system"
Can someone please help me? I really don't want to have to reformat my drive!!

A:XP System- "Error Loading Operating System"

You may be able to fix it running FIXBOOT. For details see: http://www.wown.com/j_helmig/wxprcons.htm

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Hi Folks,
I am running with an ASUS Pro31 Series and Windows XP Pro. In trying to fix a problem with Microsoft Outlooks, I was frequently rebooting my computer (trying to access the SAFE MODE boot menu) and it has now permanently failed to boot and has the following error on screen:

"Missing Operating System"

I have tried but cannot seem to access the menu where you can select to reboot in "Safe Mode" etc. I can only access the BIOS SETUP UTILITY using F2 and the BIOS RAM EASY FLASH UTILITY using F4.

Using the recovery DVD I got as far as the three options:
- Recover Windows XP to first partition
- Recover Windows XP to entire HD
- Recover Windows XP to entire HD with 2 partitions

I stopped there because it is essential that I retrieve the data from the HD. I am not concerned about the laptop, just the data. Yes I am a dumb dumb for not backing all of it up.

This laptop was supplied to me by my employer, so I am not sure how many partiotions it came with etc. Is it safe to assume that the first partition contains the C: drive data?

Are there any fancy tools I can get my hands on - over the net or otherwise - to try to get it booting normally again?

If not, what options would I have for trying to get the data off the HD?

Also, why does is it that I cannot access the SAFE MODE start up menu?
... Read more

A:Boot Failure: "Missing Operating System" - Need to retrieve data from HD!

It almost sounds like Windows became corrupted. As for data recovery unless I'm mistaken (and I might be) no data is truly lost unless the drive physically fails. I know of one program that should help with data recovery but I'm still learning about this topic.

If you are interested the program is: Recover My Files

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Has anyone ever heard of receiving the dreaded "Missing operating system" error after enabling BitLocker? Any ideas how to repair or work around this error?

The Backstory:

I have a Bitlocker-encrypted (TPM + pin) spinning 160 GB hard drive running Windows 7 SP1. Newly purchased, there is a 240 GB SSD drive sitting next to it, and my plan is to copy my whole partition from the 160 GB drive to the 240 GB drive and then enjoy a
faster computer.

First step was to fully decrypt BitLocker (took about 6 hours). Then, with the 240 GB SSD attached to my laptop with a USB adapter, I created a 240 GB partition, quick-formatted to NTFS, but did not assign any drive letter.

Next step was to boot the latest version of CloneZilla, and I did a partition-to-partition from the spinning disk to the SSD. Note that my original spinning drive did have a 300 MB partition for bootlocker - I ignored this partition and cloned only the Windows
7 partition. My reasoning was that the 300 MB Bitlocker partition may have drive-specific information that wouldn't work on the new SSD.

So with my partition cloning complete (about 1 hour), I swap the physical drives. My spinning 160 GB disk is removed and placed on the table, and my new SSD is inserted and screwed into the laptop. I restart - and boot directly into a Windows 7 install disk.
From that disk's recovery console, I run the automatic recovery option, which "fixes" a corrupt boot record.

With that comple... Read more

A:"Missing operating system" immediately after attempting to enable Bitlocker

I am familiar with those two specific messages, which are corrected by making the Windows partition active. I wouldn?t touch BitLocker until someone with a good knowledge of SSDs replies to your issue.

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I am a newbie here, so apologies for the long post.

My PC recently went into hibernation mode, and soon after i restarted windows noticed sector errors and fixed them. HOWEVER, since then it will not start windows, and now it tells me "missing operating system"

I can access the motherboard boot screen and see all of the drives(including disc drive), i have used the command prompt and can see that all the drives are active, however the SSD boot drive is not NTFS but RAW.

I have tried using my windows 7(ultimate) backup disc & a windows 7(Home premium) install disc, but both will not let me access windows, without a fresh install.

Could this be as simple as the driver for the SSD is no longer on the PC?, and i now need to source it and install it?, or is it likely that the drive is ruined?

I have a NAS which has the windows backup's stored on there, however the PC will not let me access the NAS without installing Windows, can i install the Home premium version on a new SSD and restore the ultimate from my NAS backup once the windows install is complete?

In addition is there any way to rescue the data on the corrupt SDD?, or to reuse the SSD etc etc.

Sorry for all the questions, but hopefully someone can help!

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I have a Acer Aspire 5610z and i was surfing the web and all of a sudden i got a flashing BSOD and it restarted but the system never booted it kept saying "Missing Operating System" . I used the Vista upgrade Cd to try do a repair but i had no hard drive to repair or even do an installation of vista what can i do i tried the alt f10 but i couldn't even get that to come up i can get into my BIOS . what can i do , do i need to get a fresh install of an operating system i don't mind because i have a backup of my files to an external drive i have so im not worried about important documents or anything So can anyone help me ?

A:Windows Vista x32 Service Pk 1 "Missing Operating System"

and welcome to the Forum

Sounds like you will need to replace the hard drive before you reinstall.

You can run diagnostics on the hard drive


See this for how to make a bootable cd

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This is a client's pc.SONY VAIO All In One VPCL21AFX/B
recvd a "Operating System Not Found" error msg when starting after normal shutdown
rebooted w/o external devices, same error
F8 didn't work
F12 put it into a Sony repair menu Esc'd out to Win menu
Command Line "bootrec.exe /fixmbr" - successful
reboot "Operating System Not Found" error
ran Sony Data Rescue to save data files on external drive and got nothing but empty directories
pulled HD and looked at it as an external on another machine - there are no data files
the Sony recovery utility will restore a factory load but delete all data
Where did the data files go? They were all there the night before.

A:Sony Vaio Win7 "Operating System Not Found" - missing data files

Is the HD detected in BIOS setup?

Try running a few Startup Repairs from DVD or Repair CD, which automate all repair commands, tests and fixes.

To take a look at the state of the partitions use Partition Wizard bootable CD.
Post back a camera snap if possible so we can look it over. You can scan for missing partitions using Partition Wizard Partition Recovery Wizard - Video Help. I would also run
Partition Wizard Check File System and Partition Wizard Partition surface test to check HD condition.

You can rescue files as shown in Step 3 of Clean Reinstall - Factory OEM Windows 7 then get the superior Clean Reinstall without the factory bloatware which is the worst possible Win7 install.

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In the last few weeks I've been experiencing the following issues.

The pc started to slow down, and it kept happening more and more often. Sometime it freezes and there is no way to resurrect it.
In those cases, when I go for a restart, sometimes it won't reboot: I get a DOS error message, the likes of "impossible to find disk - press CTRL+ALT+CANC to restart". When I try to do so, it still won't boot and it says that either an external unit has been removed or there is a damaged harddisk or dvd player.
Other times, after several useless attempts at restarting using CTRL+ALT+CANC, I finally get a different error message: "missing operating system".
If I leave it alone for ten minutes, then I'll likely get the screen with the option to start windows in safe mode or normally. If I choose normal, it will start indeed... until the next event.

I have replaced the hard-disk; I have excluded usb drives from the system boot (in the BIOS); I have formatted+reinstalled everything (on different hard disks) three times in the last two weeks to no avail. I am at a loss as to what's causing this, and I'm pretty much exhausted.

I apologize if I misposted, but I am taking advantage of a rare moment of lucidity of the pc.

Thank you for your help.

A:"missing operating system" and other pleasurable stuff...

So if I understand this correctly...

You started having "Missing Operating System" error messages and sometimes you can get the PC to boot into Windows, sometimes not?

Then, you did a clean install on a known good hard drive and still have the same issues?

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Hi, I've had win7 64-bit for a while now. Recently, whenever I put it into hibernation and then reboot it, I get a "missing operating sytem" error when trying to load windows. This happens 100% of the time when booting from a hibernation, but it never happens from a clean boot. Whenever I get this error message from booting from a hibernation, if I ctrl+alt+del to restart, windows will then boot fine from my hibernation file. I have tried to toggle hibernation on/off to delete hiberfil.sys but that didn't work. I've also run startup repair, chkdsk, and bootrec.exe /fixmbr and /fixboot but none of these worked either. I'm not sure what to do next... anyone have any suggestions? thanks

A:"missing operating system" after boot from hibernation

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I thought I would do a 'clean install' of Win 10 on my laptop. Used Killdisk to get rid of 2 of 3 partitions on my hard drive (not the OS partition). I must have done something wrong because now my system will not reboot. All I get is a message saying: "missing operating system". I tried to reboot by: 1) using a 'boot disk' prepared on my desktop; nothing. 2) using my Win7 disk; nothing.

More detail: I put the disks in the DVD drive while the machine in on (showing the message 'missing the operating system', then turn the laptop off. Then I turn it on while pressing F12 to get the setup menu. Then I go to the DVD drive, nothing.

Can anyone tell me what to do to get the laptop to work. If I go out and buy a Win 10 disk will that reboot and install?

A:Trying to so a 'clean install'. Now "missing operating system"

Get into the BIOS settings and make sure that it's set to boot from the DVD first. That should get it. Right now it's pointing to the HDD/SSD and there's a partition that it needs that's missing.


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Okay...here's what I did.

1) Formatted a 8.10 ubuntu partition on vista.
2) On next bootup, installed a new partition of 9.04 ubuntu
3) I then got the message "error 22" on grub menu bootup.
4) Put a windows 98 disk in, and typed "fdisk /msb".
5) I now get the message "missing operating system".

Things I have tried:

1) Looked in bios, everything is fine.
2) Ran a live CD of ubuntu 9.04, all files and things are still there.
3) Tried using vista backup disks, rebooted, but still got same message.
4) Tried a vista installation disk, which had a lot of recovery tools. "Startup repair" didn't do anything.

The only thing that is available to me is command prompt.

To reiterate, I have no idea what to do now, short of reformatting the whole drive by installing ubuntu over everything, and then installing a new version of vista. As I've tried everything to recover vista with disks.

I think I'm just looking for how I can get to the recovery console from command prompt, then try fixboot, or some other commands.

Any help MUCH appreciated...

A:Solved: "missing operating system" on bootup

Welcome to TSG!

Running fdisk /mbr with a Win98 disk has put a Win98 MBR on the drive, so it's looking for the Win98 system files, IO.SYS and MSDOS.SYS instead of the Vista files. You need to restore the Vista MBR.

Boot with the Vista DVD
Select Language, click Next
Click Repair your Computer
After is finds the Vista installation, highlight it, then click Next
On the Choose a Recovery Tool screen, click Command Prompt
Type the following lines, and press Enter after each:
Bootrec /FixMBR
Bootrec /FixBoot
Close the Command Prompt, then run Startup Repair.
Hopefully it won't find any problems, or will repair any it finds. Click Finish when it's done.
Remove the DVD and click Restart.



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I'm a novice, but puzzled, I love getting to the bottom of things. Here's one I'm working on, but I'm at an impasse (I'm going to run out of time, school starts next week):
After a re-install of Win7 Pro on Lenovos Desktop with WD5000AAKS drive, I get "Missing Operating System" when the machine is rebooted with no disk in the drive.
Machine boots if I put GRMCPRXFRER_EN_DVD (the Win7 Install Disk) in the drive before powering up or Restart.
I've re-installed more than a half dozen times with same outcome.
I've tried re-installing from 2 sources, the above mentioned Win7 Install Disk, and a Restore Disk from Lenovos, both gave same outcome. Each source was tried several times, same outcome each time.
I've tried switching the HDD mode between RAID and ACHP(?), same outcome each mode.
I've tried re-installing the Western Digital HDD driver, same outcome.
My disk partition is:

A:Boot Mischief: What causes "Missing Operating System" msg?

Hi Chaim, this error can generally only mean two things. Your hardware failure or your MBR is damaged.

Try to follow the steps here:
Missing operating system: Windows 7 (2014 Update)

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Well, obviously the thing to solve this puzzle would be to reinstall the operating system using the operating system disc handed out, however, when I come to install this, on the start up of the installing phase, it asks me to verify the operating system disc... How would I do that with the now limited use of my computer?


A:"missing operating system" ... With a twist

I belive there is something wrong with the installation disc. give me a second i'm just going to simulate this on my PC.

edit: it would be best to borrow someones "full installation disc for vista"

does it look like the pic attached?? if not could you take a picture of it and attach it

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my PC has been running fine until yesterday, when i tried to boot up and got a Missing Operating System error. I am using 7 Pro 64bit, on a new seagate caviar green 1TB HDD, i5 750, 4gb ram, well cooled system, so i cant see any reason for the hardware to have failed. i have run seagate's own SeaTools testing on my older rig, XP, and it has passed the lot, and can be accessed as a 2nd hard drive, but i cant boot off of it. I have tried booting the Windows 7 install disk but it wont find a hard drive to repair. HELP PLEASE

thanks for any suggestions

A:Solved: "Missing Operating System" 7 Pro

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That's what's popping up in DOS whenever I power up.

The last thing I did was use Partition Magic to create a new partition, into which I was going to place an image of my newly virus-free HD in 4.6GB increments. I can see that it's still there in the PM interface. (I can boot to the optical drive.)

I now have one logical NTFS partition @ 36GB
The primary partition is now @35GB, with @27GB of that space used.

I began with one primary drive @71GB.

What further information do I need to provide here before anyone could help me?

Thanks in advance for your help,

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So I'm trying to diagnose and help my boyfriends little brother's computer. His computer wont turn on and only says "missing operating system"

He's a Gamer so its a after market tower how ever while running SeaTools tests, I was able to see the HD info.

Drive Info:
Device 0 is a ATA Device Hitachi HDP725050GLA360
Serial Number: GEA564RJ1ZM90A on Generic PCI ATA
Max Native Address 976773167
device is a 48 bit addressed - number of LBAs 976773167 (500GB)
Drive supports security features
SMART has not been tripped
DST is supported
Logging feature is supported
POH 20587

anyway anyone know how to fix this?!

I tried to boot via Ubuntu USB and Win 7 Prof CD neither recognized, well CD drive gave prompt for any key to boot and then again stated "missing OS."

comments, suggestions?!

Thank you!

A:"missing operating system" Vista

For a temp fix I was able to run Ubuntu from a USB ended up installing it on the drive, continuing I'll be installing Win 7 Prof next time I'm near his computer.

At least in the mean time he's able to use the computer. pit fall is as a gamer his games aren't compatible with Ubuntu.

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I recently reformatted my computer to start all over with a fresh copy of XP Pro. I ran into a number of problems, though. First, I was missing the ntldr, so I made a boot disk from this computer, then it told me I needed hal.dll. I tried downloading the floppy boot disk setup from Microsoft, but there's something goes wrong with the 3rd disk every time. THe hard drive was formatted to NTSC, but I thought I could get rid of the ntldr thing by reformatting to FAT32. Now when the computer boots up with no boot disks, it says "Missing Operating System". I've tried the "boot disk essentials" disk, but it gives me an error about copying files, and I don't know what else to do. I was up until 6 this morning trying to fix this stupid machine, but I guess I'm stupider than it is.

All I want is to get the XP setup disc going with no problems. Please Help.

A:"Missing Operating System" after reformatting

All you should be doing is putting the XP CD in the drive and booting, to fully install it.
Then just follow the options.

If it does not boot from the CD, it usually means you need to go into the BIOS at power up and make sure that the CD is selected above the Hard Drive in the Boot order.

Just how are you going about trying to load Windows XP?

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I have had my Dell 8700 for little over a year and have had problems from the beginning.  I am 72 years old, and I am at my wits end!!!

A hard drive was replaced in the summer of 2015, but I have still had problems with the computer shutting down and my having to refresh it to factory setting.

I thought updating to Windows 10 would solve some problems, and I did this in October, 2015.  Everything was fine until a couple of months ago.  The end result was when I tried to refresh the computer to factory defaults, it went back to 8.0 or 8.1, and I evidently lost something in the process.
Now, I cannot update to Windows 10 and when I tried to resinstall the Dell Operating System, I get for both:  "WE COULDN'T UPDATE THE SYSTEM RESERVED PARTITION."
I DO HAVE A SYSTEM BACKUP ON 20 CDS (MADE WHEN I HAD WINDOWS 10).  Could I reinstall the system with these backupdisks?  How do I do that?  I also have a Dell 2 Boot USP stick, I have a recovery stick, too, but it semed that when I used this, I received a message that not all files were recovered
What should I do at this point? 

A:Error message when trying to update to Windows 10 or to reinstall operating system 8.1: We couldn't update the system reserved partition."

On MBR disk, Windows 10 requires a 500MB system reserved partition, while 100MB in Windows 7, so you can try to extend system reserved partition.
In disk management, you can only extend partition using the unallocated space next to its right side. so even if you shrink D: drive, the option to extend the efi partition is still grayed out. My suggestion is to use a third party software, AOMEI Partition Assistant, both the standard (free) or the Professional(paid) version can extend partition as long as there is unallocated space on that hard drive. to see more information read:
Fix "We Couldn?t Update the System Reserved Partition" Error

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i have a problem on my pc that when l play games such Warcraft III
which low graphic game and in the middle of the game the computer restart and after reboot an error massege :
the system have recover from serios problem
and its code is:
BCCode : 1000008e BCP1 : C0000005 BCP2 : 80585490 BCP3 : F69FA918
BCP4 : 00000000 OSVer : 5_1_2600 SP : 2_0 Product : 256_1
i will be very grateful if i get a solution

A:System error massage

what is your rig like?
CPU, PSU and RAM will help!

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Today i formatted my hard-drive on my computer which had multiple installations of windows (XP and 2000), but when i try and start up the computer using a Windows 98 boot/startup disk, after "Verifying DMI Pool Data......." a message saying "Missing Operating System" comes up below. i have tried also a Win 95 and the XP set of startup disks but i haven't had any luck as such. can anyone please help?

A:Missing Operating System error

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Ok I have seen it all but not this sumone help, Ran Memtest86+ runs fine ran long short all kinds of HD test all check out as PASS Installed a fresh copy of windows xp on a custom built machine that i put together by combining two computers into one. I am runing 2GB ram Pent 2.4 onboard Video audio lan One 250GB HD and One DVD Writer on windows xp. I Changed the batter on motherboard and reset the bios to default settings.
Every time I turn on the computer I get that Messege Error Missing Operating System i push alt cnt del and the computer restarts and windows start normaly in normal mode automatically, no blue screens no crasher or freezing ever I set HD as first and only boot device. Please help

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I have an older "Leading Edge" computer that had Windows 3.1 installed on it. It has been F-disked and Formated without using the /S command. This has made the MSdos Non-bootable. I now get the error message "Missing Operating System" and cannot get a floppy bootdisk or bootable CDROM to load windows.
How do I fix this problem?

A:Error: Missing Operating System

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Ok its a bit of a long story, but Id really like some help!

I currently upgraded from Windows XP to Windows Vista Home Premium edition via their website. I downloaded the new operating system with the upgrade. I do NOT have it on disk. After about 2 days of running it, I turned my computer on first thing in the morning, and the error message came up saying "Missing Operating System". I have tried everything! I went and checked the BIOS settings and everything seemed normal. I have no idea what happened! I can't make any boot floppy's b/c my new Compaq doesn't come with a floppy. It won't let me go into the recovery console (F10) but it will let me go into Setup (F1). F5 and F8 options are not available as options either. If anyone knows what I can try to do, please let me know! Thank you!!!!!

A:Missing Operating System Error

Try the Microsoft support page here.

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I am trying to install windows 7 operating system in my dell laptop with pen-drive. So i set priority as removable disk as my primary boot device in BIOS settings. When i try to restart my laptop i am getting missing operating system error. Can anyone please tell me the solution.

A:Missing Operating System error

How did you put windows 7 in a pen drive?
Is the pen drive bootable?

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Hello Guys i am New To The Forums and i am having Problem installing windows 7
i want to install Call of Duty Ghosts which require 64 bit Version of windows 7 ultimate and i am using the 32bit version of windows 7 ultimate i am installing it using USB Drive i used the tool Bootsect With Windows USB/DVD Download to Format it
After that i set my usb Primary device in BIOS Still it says Missing Operating System
i Hope someone Knows The Solution of the problem
Many Thanks.

A:Missing Operating System Error,

You need to boot the installation media and not the hard drive. Once booted use the Drive Options pictured in Steps 6 and 7 of Clean Install Windows 7 to delete all partitions, create and format new as you wish. Ignore the small boot partition it creates, install Win7 to first partition.

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Oh goodness pls help me out guys!

I get a "Missing Operating System" error everytime I boot my computer. This is how it happened...

I installed Ghost 2003 on my system, and decided to "clone" my C: partition to another separate harddrive. So after setting the options up I was asked that Ghost would restart my computer to carry out the instructions. So after restart, boom! I get the error and I remembered why..

I had Shadowuser installed and running! Shadowuser basically locks your Windows from modification so you always get a fresh system after every restart. So in my panic I got another harddrive with Xp and made my malfunctioning drive the slave drive to check if all my files are still there and fortunately they are still there. (that drive originally had 3 partitions but now Ghost seemed to create another small partition (making it 4) and set that as the active one, but since I had Shadowuser installed it was interupted to complete the instruction. So how do I fix this? Im scared to lose all my data and customizations!

PLease help me,,,

A:"Missing Operating System" Pls Help

see if this don't help:


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I'm selling my PC and long story short I went through thorough steps to ensure that I didn't leave any traces, I didn't do a clean OS install or format because I had a digital copy of windows 8 via upgrade and after using CCleaner to free space, uninstalling unneeded software, and manually removing remaining junk folders that weren't essential to windows, and with a reboot I got a black screen with a the message "Missing operating system".

I've done several reboots during this and the last thing I was doing was trying to remove a user folder, I deleted my original user account and was instead using a secondary local admin account I made. Despite removing the account and all my "files" a single folder with hidden files existed, I couldn't view them for whatever reason it was 2 folders "Sam" my name and inside "Desktop" however there were no contents in either folder but windows said they were 3GB in size. So was trying to delete it , getting an error saying need permission to delete <a long string of letters> , and it wouldn't remove. So I thought rebooting would do the trick, but when I did reboot I got the message. I can't figure out how to get it to work.

I do have my windows 8 product key, luckily. Any help would be awesome.

A:"Missing Operating System"

Sounds like vbr damage. Boot the windows 8 installer and let it try to fix automatically from the startup repair tools.

I had a digital copy of windows 8 via upgrade

Or you could run the win 7 startup repair , might take 2 or 3 runs.

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I took two "Seagate: barracuda 750gb" hard drives out of a Dell XPS 8300, they do work fine in that PC, has Windows 7. I connected it to a new build, and when I boot the new PC it says I'm missing operating system

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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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The lame recovery cd they provided only offers me the option to format and restore everything and lose all data on hard drive.

I would appreciate any ideas. Thanks.

A:Missing Operating System error on Acer PC

When you boot with DVD, is there an option for system repair?

You should see a screen like this -

Regards. . .



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When using the HP 3005PR Port Repliator I'm getting a black screen on boot-up with a 'Missing Operating System' error in the upper right corner and won't go any further. When I take away the port replicator it boots up just fine into the OS. Any ideas on how to fix this? Thanks,

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Whenever my computer tries to boot, it takes a while to detect anything from the CD-ROM (my first boot priority), and then when it detects the IDE, it says "error loading operating system" and after that I can't do anything but restart or shut down. I am running Windows XP Professional and it will load with a boot disk, but if I take out the boot disk it won't load. I'm not sure what to do, so please help me!

A:Solved: "error loading operating system" message when I try to boot

hi there, im sorry this isnt a solution. but i am having the same problem.

my old hard drive kicked the bucket and i got a new one. i cloned the hard drive using TrueImage which went fine. but when i restart the comp i get that error. i have tried to change the bios access mode to Large LBA and the other one but to no avail. i have herd that running the command fdisk /mbr may help but it could also cause problems.

does anyone know how to get past this?

also reinstalling xp doesnt work. i have formated the hard drive and tried to set up windows but to no avail

Thanks Lee

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guys i am on the brink of messing up everything please help me
it all started when i installed a transformation pack for vista.

i basically restarted my pc after reinstalling and everything was fine.
i ran a virus scanner and it spotted some suspicious files, but i also noticed some strange files in my C:\ drive. so i just deleted them not thinking they would be important.
unfortunately for me, when i restarted my pc, i got the message
"error loading operating system"

and i started panicing and didnt know what to do(thank god i have another computer which allowed me to make this post)

anyway i booted from my thw windows xp disk, and went into recovery console.
i then typed chkdsk/r and as soon as i hit enter
it said, windows has encountered one or more unrecoverable errors.

so i typed in, fixmbr, because i thought i might have a problem with the master boot record.

now nothing happens when i restart.
it just shows a blank screen...
what should i do., im begging anyone to help.
i really dont want to lose all my files that ive got(its over 100gb of my stuff)

how can i recover this
anything at all.
please help me!!!

A:"error loading operating system" need some expert advice FAST!

Are you running Vista or XP? (This is the XP forum.)
Which files did you delete?

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I switched my Fujjitsu-Siemens Amilo li-1718 the other day and was met with the dreaded 'operating system not found' message.

I haven't changed anything big recently, and it's more or less been working fine for a long time now.

I had, however, just had it in a bag and moved it across town, so after reading up I thought maybe something might have come loose inside. But I also read that it could be a BIOS problem, and after going in there I noticed that under 'hard drive' in 'main' it said 'None.' Changing it to auto or user didn't seem to make much difference as it still wouldn't load and would always revert back to none.

However, I also read that if the computer keeps resetting itself to an arbitrary time and date that it can be symptomatic of a CMOS problem... my computer had been doing this occasionally for a month or two before this happened.

I also tried making a windows vista recovery CD, and tried to boot off that, but still got the same 'Operating System Not Found...' message.

Basically, I want to make sure i've tried everything before I open the case and go poking around inside, as I'd really have no idea what i'm doing, but i'm hoping it's just a loose wire that will be pretty self-evident when I open it up.

Any ideas?

A:"Operating system not found" - BIOS or Hard Drive error?

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Hi I reinstalled windows 8.1 on my Samsung NP530U3C-A10EE. And now the problem this that I can't boot it without usb stick that contains windows installation files. I can boot up windows and remove the usb stick evertything is working perfectly, but if I try to boot up win without usb, it gives error "Operating system not found. Press CTRL+ALT+DEL to restart". VOLUME C:\ is one where windows are installed (SSD), System Reserved is the system partition that windows create automaticaly (SSD), volumes D:\ and F:\ are my hdd volumes D:\ is empty & F:\ is stored with my personal files (photos, music etc.)

P.S if i make C:\ active I can't boot up even with usb stick plugged in...
Maybe someone knows the solution? Thanks for responses.

A:Windows 8.1 boot error "Operating system not found"

You can try from Admin command prompt:
diskpart -> select disk 0 -> select par 1 -> inactive -> exitbcdboot C:\Windowsshutdownswap the cables between disk 0 and disk 1. (Make your Windows to be disk 0)From BIOS, set boot priority to this disk 0Reboot without the USB connected.

Hope this helps !!!

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Hi everyone. While I was installing windows, my mom accidently hit the fuse in my garage and the power went out. When I rebooted the computer, it says "error loading operating system". I wasn't even half way done installing it. What can I do? I was thinking I could start fresh but I do not know how to do that.

Thanks!! If you have a solution, please tell me, my spring break ends on Monday and I would like to get as much gaming done before I go back to school!

A:HELP!!Power went out while installing XP!"error loading operating system"

oh yeah, by the way, i cant install it again, every single time I reboot, i get the message "error loading operating system"

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So here is my problem: Occasionally, after reboot I get "Error loading operating system". After that the only thing I can do is shut down the computer and fix the windows MBR/Boot Sector (see bellow?).

I'm running a clean install of Windows XP Pro SR3 on a Lenovo T61 laptop. I have confirmed that in the majority of times the problem with the MBR/Boot Sector happens during the windows session and not necessarily upon reboot. When it happens there are no symptoms in windows except for when I try to run chkdsk, I get the following error:

"The type of the filesystem is RAW.
CHKDSK is not available for RAW drives."

I've had my T61 for 6 months now and I've had this problem about 15 times so far. Obviously this makes my T61 unstable and is becoming a major problem (I like to shut down the computer before taking it anywhere, and I don't really use Hibernate).

Solving this problem is very easy and takes 3 minutes? But the Win XP CD is needed for the fix and I don't want to carry it around with me everywhere. And anyway, it's annoying and makes my T61 crippled?

To fix the problem:
1 Change AHCI -> Compatibility in BIOS.
2 Boot using the Windows XP CD.
3 Enter the Recovery Console (press R).
4 "fixboot"
5 "fixmbr"
6 Restart ("exit").
7 Change back to AHCI in Bios.

After that the computer works perfect until the next time? Things I have tried so far:
1 Installed latest Bios for T61.
2 Checked firmware fo... Read more

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Hi everyone,
I had windows 10 installed on my Dell Inspiron 7720 laptop for around a year. I wanted to roll back to windows 8.1, so i downloaded the usb media from microsoft website.I booted from the pen drive and formatted all the drives. After that I proceeded to install windows 8.1. When the setup had just started copying files, my laptop shut down due to low battery. Now when i am trying to boot from usb or dvd, i am getting an error saying "An operating system was not found. Try disconnecting any drives that don't contain an operating system. Press Ctrl+Alt+Del to resart".
Also, when I am trying to change the boot order or to load default settings in bios, I am getting an error - "FORMSET 98FBBCFB-1392-4FDE-ABB8-C41CC5AD7D6D
Failed to save storage: Boot_mem-Boot_ITEMS. Status Access Denied"
Someone suggested me to reset the bios by reseating the CMOS Battery. Did that but still getting same error. I have run out of idea now, and desperately need help. If someone has any suggestion, please help me out.
Ravi Kaurav

A:"An operating system was not found" error while trying to reinstall windows

Is your bootable USB FAT32 formatted and using the GPT partition scheme for UEFI BIOS.
Is Secure Boot Enabled in your systems UEFI setup?
Have you tried with Windows 10 Installation Media?

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Son in law just bought a new toshiba laptop, and he has gotten the error, not sure of code as he shut it off and rebooted and said that works... daughter and I think there is a serious problem... and computer should be returned, he said he had told her about the error and she said OK, but when I saw it tonight he said he had talked to his "tech" friends and they said it was OK .... I don't think that is right. maybe he was just trying to cover his *** as he is headed downrange for a month )army) and the laptop is his only form of contact with his family and entertainment and thought he would be without it if he had to return to factory...

any feedback would be appreciated, only saw last part of error code, saying operating system could not be located.


A:new lap top computer gets start up error "can't find operating system"

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Hi, i recently built a computer with an abit an-7 mobo,a 160gb maxtor hdd, 512mb of ram and a radeon 9250...anyway
I was booting up for the first time with the OS (winxp home) in the cdrom rom drive, everything was going peachy until it came to formatting the hard drive, it took about an hour or so but when it was complete an error came up saying that it was unsuccsessful and the disk may be damaged... i then tried a "quick format" and then the setup decided that the disk wasnt inserted into the cdrom drive, giving up i quit setup and rebooted, on the next cycle on startup a message "error loading operating system" popped up and now wont go away... what can i do to stop this, and what can i do next time to make setup sucessful.

Thanks alot, any input it much appreciated, i have found similar posts but all of them are problems happening after winxp was installed, from friends input it seems my hard drive needs to be reformatted but i cant get to it anyway, ive tried to boot dos, fdisk and maxpower from the cdrom drive but to no preveil, once again any input is really appreciated, ime a real noob and am probably missing something stupid

A:"Error Loading Operating System" - But Xp never finished installation


I would be inclined to download the diagnostic software from the maxtor site and zero the disc and check it over for faults and then use the 'install disc' option within that software and start again with XP - if the disc checks out OK that is.


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