Over 1 million tech questions and answers.

"Unknown device", installing drivers not working

Q: "Unknown device", installing drivers not working

IBM ThinkCentre A50 8320-7EG, Windows XP

Just reformatted and reinstalled, lists the ethernet, audio and video as 'unknown devices' (ethernet at least definately worked fine before reformat). All integrated with the motherboard.

Have tried to install drivers from the disk, downloaded from the IBM website and from driver packs but nothing has had any effect, using the wizard it won't recognise any drivers, installing the alleged drivers manually it says they have installed on the installation wizard thing, but nothing's changed with the device in device manager.

I assume somehow I must have the wrong drivers, but not sure how this could be the case, or really what else I can try.

Thanks very much for any help!!


Preferred Solution: "Unknown device", installing drivers not working

I recommend downloading and running DAP. It can help sort out any driver and firmware related issues on your system

It's worked out well for many of us in the past.

You can download it direct from this link http://downloaddap.org. (This link will open the download page of DAP so you can save a copy to your computer.)

A: "Unknown device", installing drivers not working

Read other 6 answers

We used to have "stereo mix" option that enabled streaming audio recording without having to have the audio playing through the speakers. How do I do that now? What replaces that capability? Who makes my sound card? Why is that not readily available somewhere in Dell land? I can't believe forum searching found pretty much nothing on this.

Read other answers

Hi, I'm trying to reinstall my sister's scanner driver because XP has decided that it's not there any more. This happens occasionally and usually reinstalling the driver fixes it (I think that's what I did last time), but this time i just can't get it to work.

If i unplug the USB cable then plug it in again, it comes up with a message saying that the device has malfunctioned and it doesn't recognize it. I have the driver CD but windows always manages to install it as "Unknown device" before i can tell it to search the CD. I've tried telling it to reinstall the driver from the CD but it says that there are "no better matches for this device". I've also tried uninstalling the program form the CD and reinstalling it then restarting the pc but that didn't help either. I tried plugging it into another USB port (as suggested by Windows Help Center) but that still didn't work.

It's not often that something like this gets me in a circle and scratching my head but I'm really starting to run out of ideas.

Any help would be very appreciated, i just want to get this thing running again

A:Stubborn Scanner Driver - "Malfunctioned Device" and "Unknown Device"

Could it be that the scanner really did die?

Read other 2 answers

I have looked over many, many other forums and threads regarding this issue, but to no avail, have not been able to solve my problem. I'm starting to think that some hardware that communicates with my Webcam could be damaged - but I have not given up hope that this could be solved alternatively.

Here are some of my PC specs:
OS Name Microsoft Windows 7 Professional
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name BRADY-PC
System Manufacturer Hewlett-Packard
System Model HP Pavilion dv3 Notebook PC
System Type x64-based PC
Processor Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date Hewlett-Packard F.14, 07/01/10
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
My laptop came preinstalled with Windows Vista Home Edition - I have since upgraded. The webcam was functional with both OS. Also, my BIOS is not updated with the most recent available software (F.15 is available). I had F.15 and downgraded to F.14 to see if that might solve my issue, but it did not.
I have tried a variety of different things (clean boot, various installs of the driver, uninstalled all of the devices listed in Universal Serial Bus controllers and restarted), but again, to no avail.
I'm hoping... Read more

A:Built-In Webcam Not Working - "Unknown Device" USB Code 43

Since your webcam appears to be USB it can be two possiblities

You need to re-install the driver for it, or more likely follow these generic USB fix-it instructions
Tips for solving problems with USB devices

Read other 9 answers

When I view the volume settings, it says "No Audio Device", and when I view the "Device Manager", under "Sound, Video And Game Controllers" it reads as follows:

Audio Codecs
Legacy Audio Drivers
Legacy Video Capture Devices
Media Control Devices
Standard Game Port
Video Codecs

How do I find out which sound drivers to install? I have already tried Realtek AC'97 Audio and when it installed.. it finished halfway and a message popped up and said "Uninstalling audio drivers". I removed and re-installed Realtek AC'97 Sound Drivers. Well, it refuses to install the "driver" file actualy, that's the main problem here.

My PC is really messed up, I deleted a bunch on notepads because it was taking up my hard drive and I needed to install a game. But that didn't work out great :| Now my computer is missing Search Companion, System Restore, and Regedit ! HELP! How do I get those back?

I went on to crucial.com to do a scan to find out my mobo it's called:
MSI (Micro Star) MS-6566E (845E Max) Motherboard

Microsoft Windows XP Professional
Processor: Intel(R) Pentium(R) 4 CPU, 2.40GHz
Memory: 512MB of RAM
7.85GB Hard Drive :O

Thanks in advance~ !

A:"NO AUDIO DEVICE", tried installing sound drivers but it refuses !

You "deleted a bunch of notepads"? OH NO!!!! Never do that unless you are 100% sure the file will have no effect on your PC!

Wow... it sounds like you may need to do a "Repair Installation", using your XP installation disk (the same service pack as your current installation)

You could try this, if you have your disk..to replace critical files, for starters:

Type "command">

In command prompt, type: "sfc /scannow"

Read other 3 answers

Hi great guys at SevenForums. its me again...and this damn ASUS. anyway, I have attempted to install windows 7 via usb to my system(system specs under profile), but i receive a prompt about device drivers and i cannot continue. The image is an original .iso for windows 7 home premium, downloaded from digital river using a direct download. the usb is a 4Gb transcend. note: (windows device manager says the drivers for both usb and hdd are most current, and devices are working properly.) oh, My hdd is a Seagate 5400.6 320Gb internal laptop drive. i burned .iso to usb using UUI. I do not have any dvd's to use, i had 1, but i wasted tryind to burn winRE to disk. hdd has been formatted by windows to accept install but it will not. PLEASE HELP GUYS! You guys helped me with bad memory modules on sevenforums before, i hope that there is a guru for this issue too...all the thanks, Fedaru.

I read on another post about removing disk drive before install but this asus notebook is like fort knox! i would have to remove a cover like 10 screws, and that may void warranty.

A:"load device drivers" prompt while installing windows 7 via usb

Hi Fedaru,

I have seen this message before if the USB drive you are installing from, is inserted into a USB3 port. This happens because USB3 ports require 3rd party drivers, and the drivers only make the port fully available after Windows 7 has loaded.

Can you check to see that it is inserted into a USB2 port? If so, try inserting into a different USB2 port, and trying the installation again.


Read other 6 answers

I have a HP ML110g5 server which I have disconnected the smart array and connected a HDD via sata directly to the motherboard.
when installing windows 7 "No device drivers were found etc."
does anyone know where I can get the drivers (I assume for the HDD) so windows will recognise where to install windows.
Bios does recognise the HDD.
the HDD model is 9ca152-784 by seagate

at a loss?


A:installing windows 7 "No device drivers were found"

Hi jls6872, Welcome to the forums, Here is the link to the drivers HP ProLiant ML110 G5 Server*-* Download drivers and software - HP Business Support Center The OS is for the windows server edition ,Use these drivers and install in compatibility mode , Theoretically these drivers should work for you but I am not 100% certain

Read other 1 answers

I have two issues, which I think are related. In the Device Manager, it shows under USB Controllers "Unknown device". "Windows has stopped this device because it has reported problems. (Code 43)"

I tried updating the driver, but the driver was correct.

I tried disabling the device.

I uninstalled the device. Windows reinstalled it at next boot, but the problem reappeared.

There is no Imaging Devices in the Device Manager.

At the same time, my webcam failed to open. Message "Webcamera initialization failed."

I downloaded the correct webcam program from Toshiba, installed it, but same result.

This all started when I uninstalled and reinstalled Skype. I have tried uninstalling it again, but still no webcam.

The webcam is enabled in the BIOS.

I really do not want to reinstall Windows.

All help appreciated.

Toshiba Satellite P500 16J
Windows 7 Ultimate x86
All updates installed

Read other answers

--Love the website motto: [stupid questions are easiest to solve.]

I am running Win7x64 on a newly installed (non-laptop)
MSI ZH77A-G43 motherboard with i5-3570

I spent a couple of days ensuring that I had installed all of the drivers
including the chipset, facilitated by MSI's LiveUpdate5.

I have a simple USB thumb drive.
I take it to my roommate's (VISTA) computer--it plugs in just fine. I cleaned, rewrote, read.
I did a check for errors scan; in properties, it is FAT formatted with default allocation size (2056).

I plug it into my computer (detailed at top). I am not even getting a common problem--"unrecognized USB device."
It does not even know that it is USB apparently--I get an error box from the system tray:
TITLED: Driver Software Installation
Device driver software was not successfully installed.
unknown device (fat red) X Device unplugged
unidentified device (fat red) X Device unplugged
[nonsense help links from MSFT] CLOSE box

There is a small led on the thumb drive that shines steady.
(assumably indicating something is wrong; nevertheless power is present)
(normally, it flashes on and off a couple of times when recognized on VISTA computer.)
(yes I tried multiple USB plugins, on front and back of tower-case)
I hear an audible "g-dunk" sound every 1 second.
The Device Manager window, though functional and operational, briefly flashes
in response to every g-dunk (a 1/2 second later.)

I finall... Read more

A:Thumb drive "unknown device" "device unplugged"

Read other 16 answers

At some point in the last three months, a number of machines have stopped being able to add new USB devices.

These can be USB headsets, mass storage devices, anything. This includes devices which previously have installed fine and been working without issue.
In device manager, the devices show as "No drivers are installed for this device". However, if you click update drivers, and then manually select the Mass Storage (for example), you can install the device without a problem.
This has nothing to do with any vendor specific drivers - This is a Windows 7 issue.

Has anyone seen anything similar?
Is anyone aware of a recent update that may have had an impact on the USB stack or the operation of PnP?
Any other ideas?


Read other answers

Okay, I have an ATI Radeon 8500 on my Windows XP system, and one day, after my dad had used the computer, the 3D video driver stoppeed working. He can't recall doing anything. So it goes. I think "whatever", downloaded the latest Catalyst drivers, and try to install it, only to get the message "INF Error, Video Driver Not Found" and then "Try to set up your adapter with a standard VGA driver before running setup". I tried googling for info (apparently it's a common-ish issue), but I never found anything that worked. I tried uninstalling anything ATI and then installing, to no avail. I tried uninstalling the error-listed VGA adapter from the Device Manager and then running install which didn't work. Rebooting after that also didn't work (it popped up with "New hardware found" after the reboot, but it couldn't find the proper drivers).

After an unedifying series of adventures I got to http://www.msi.com.tw/program/support/download/dld/spt_dld_detail.php?UID=45&kind=1 which has several drivers for my mobo. I first downloaded (obviously) the VGA driver, and tried to run setup. Unfortunately, after preparing the install, an Error message pops up saying "The system cannot detect the device, please confirm that the device is configured properly and restart the setup program." I then tried downloading the AGP upgrade, installed it, but nothing changed. I also downloaded the BIOS update, since it mention... Read more

A:"INF Error", VGA Driver "Missing" Installing ATI Catalyst Drivers

the radeon is not integrated with your motherboard, and the onboard video has probably been disabled in the BIOS. to install the appropriate drivers for an ATI radeon 8500 card you need to download and install the drivers from ati's website. from there you can download the latest version of catalyst and install that.

Read other 13 answers

Ok, now I get another problem... When I click "install now", I get a msg box that is saying 'no device drivers were found. Make sure that the installation media contains the correct drivers, and then click OK'

What should I do now?

A:When I click "install now", it's saying "No device drivers were found"

Is the HD showing in BIOS?

Can you post your specs.
Filling out System Specs
Dont Know What Hardware You Have..??
VistaForums SysInfo Tool - Vista Forums

Read other 9 answers

I'm experiencing slim keyboard not being recognized in the Windows 8.1
The keyboard was working fine until just one day it just stopped working.
I tried factory reset literally 8 times along with most recent BIOS update and dell's recommended update software. + power setting --> disabling power saving on USB
It still come up as unrecognized each time even with fresh reinstall.
I was wondering if this is a hardware issue or just software bug from factory reset.
I don't think there is a available driver for this kind of problem is there?

Log Name:      Microsoft-Windows-Kernel-PnP/ConfigurationSource:        Microsoft-Windows-Kernel-PnPDate:          8/6/2016 1:09:35 PMEvent ID:      411Task Category: NoneLevel:         ErrorKeywords:      User:          SYSTEMComputer:      DellDescription:Device USB\VID_0000&PID_0002\5&1347b1a9&0&4 had a problem starting.
Driver Name: usb.infClass Guid: {36fc9e60-c465-11cf-8056-444553540000}Service: Lower Filters: Upper Filters: Problem: 0x2BStatus: 0x0

Read other answers

I have a fundamental problem and I know I will be told to revert to an older version of Mac/VMWare or just to Linux, but I'm so close to get everything working.

Basically, I just want to be able to do work with assembly language for the Computer Science degree I'm doing at DMU. To do this I have to have installed:
- Kate (KDE)
- Insight
- LD
I have managed to install Kate, GDB and NASM (using MacPorts) with the ability to install Insight if I can get the linker (ld) up and running.

Now, the main error message I got was through following these commands (in the Kate terminal) - my program being "eatsyscall.asm:"
bash-3.2$ nasm -f elf -g -F stabs eatsyscall.asm
bash-3.2$ ld -m elf_i386 -o eatsyscall eatsyscall.o
ld: warning: option -m is obsolete and being ignored
ld: file not found: elf_i386
I ran "-m elf_i386" due to the fact I am running a 64-bit OS and Jeff Duntemann says so.

I did an "ld -v," which gave me:
@(#)PROGRAM:ld PROJECT:ld64-136
configured to support archs: armv6 armv7 armv7s i386 x86_64
LTO support using: LLVM version 3.2svn, from Apple Clang 4.2 (build 425.0.24)

Following this, I basically searched for every MacPort containing "elf_i386" and "i386" and "gcc" and installed every one apart from "i386-rtems-gcc" of which I got an error when attempting to install:
Michaels-Mac:bin michael$ sudo port install i386-rtems-gcc
---> Computing dependencies for i386... Read more

A:"ld" not working and "i386-rtems-gcc" not installing (MacPorts) on OS X 10.8.2 VMWare

Torrent eh? And on non-Apple hardware? That's two things that are not permitted here or by Apple's EULA therefore I'm closing this thread.

Read other 1 answers


On a fresh clean Windows 8 image, my software driver (signed) installs fine and shows up properly in the Device Manager. However once i uninstall it , subsequent reinstalls show up as 'Unknown Device' in the Device Manager.

From the device details, I find that it refers to /looks for the .inf file in c:\windows\inf folder but the file itself is missing from the location. The FileRepository has all the required files. But trying to update from there also fails.

Could anyone help me with troubleshooting this problem. What could be going wrong.


A:Device manager shows "Unknown Device" on reinstallation of driver

Please fill your system specs to get help efficiently.
What is your computer make/model?

Read other 1 answers

"no audio device" "no playback device" "No Sound Card was found"
ok.. I'm stuck.. puzzled...

I recently had a professional computer fix it company wipe my computer and now I do not have any sound. I do not have even the little icon on the bottom left hand corner to turn volume up or down. My keyboard does not allow me to turn the volume up or down, it seems unresponsive to volume but does light up on the screen showing VOLUME... but of course, there is no volume... I am computer illiterate and thirsty for answers...

Operating System
Microsoft Windows XP Professional (5.1, Build 2600)
Media Center Edition Version 2002 Service Pack 3

System Manufacturer: HP Pavilion 061

System Model
Enclosure Type: Desktop
RC663AA-ABA a1640n

BIOS: Phoenix - AwardBIOS v6.00PG

Intel(R) Core (TM)2 CPU
6300 @ 1.86GHz (2 CPUs)

Memory: 2046MB RAM

DirectX Version: DirectX 9.0c (4.09.0000.0904)

Control Panel>Sounds and Audio Devices>Volume
indicates "no sound" and Device Volume is all the way to LOW and everything is GREY and untouchable/unchangeable

Control Panel>Sounds and Audio Devices>Audio
indicates "no playback devices" on Sound Playback

Sound recording is working fine as I use skype many times but I can not hear the other party but they can hear me just fine.

Starting with the BIOS, I went into Audio and made sure this was enabled.. it was...

downloaded/installed Microsoft... Read more

A:"No audio device" -- "no playback device" -- "no sound card was found"

STLj said:

after RUN>
typing in "dxdiag"
it reads under notes,
"No sound card was found. If one is expected, you should install a sound driver provided bv the hardware manufacturer".

This is where I get fuzzy and lost. Do I need a new sound card installed? Is that the problem?Click to expand...

That dxdiag "no sound card" message is misleading as I've found it says that if no driver OR sound card. I think you're missing the right driver

Also, it would seem from your post you have High Definition (HD) audio. Which means you'll need to find the right High Definition audio driver. (AC97 pre-dates HD audio so the Realtek AC97 couldn't be right)

Try starting on the HP support website HERE and enter your model number or they have a button where they'll try to identify your product and drivers for your model. They should list an HD audio driver there

Read other 1 answers

Referring to this question: http://bit.ly/2sSe5Tw 
I don't have any USB 2.0 ports, no optical drive, and no options to change the setting in my BIOS.

Read other answers

When I tried to install windows 7 Home premium (Dell) on my pc, I get this message...All it gives is only OK, Cancel and Browse options...I tried browsing everywhere in my pc but it didn't solve that...Hope someone would help me...
The actual message is:
"A required CD/DVD drive device driver is missing.  If you have a driver floppy disk, CD, DVD, or USB flash
drive, please insert it now.  Note: If the Windows installation media is in the CD/DVD drive, you can safely remove it for this step."  <Browse> <OK> <Cancel>

A:"No device drivers were found. Make sure that the installation media contains the correct drivers, and then click ok"

I have had the same problem on an Acer laptop.  My issue was that I tried to install via the USB 3.0 port.  Both external dvd and usb/iso failed.  Iserting the USB stick into the USB 2.0 port, and installed flawlessly.

Read other 36 answers

I have a customized Asus M4A875-M system with:

- Phenom quad core 9750 CPU @ 2.4GHz
- 16GB RAM
- BluRay & DVD R/W optical drives (2)
- 500W Antec power supply
- 4 disks:
= drive 0 - Vertex2 80GB SSD 2.5"
= drive 1 - Toshiba 680GB 2.5"
= drive 2 - White Label 1TB 3.5"
= drive 3 - Seagate 1TB ST31000528AS (just upgraded drive firmware to CC49 from CC45)
= Windows 7 Ultimate
= OpenSUSE tumbleweed linux
= Linux Mint 17.2
= Windows 10
= Windows 7 Home Premium
= OpenSUSE v12.2

My boot loader is grub2 with a nice custom boot menu using this background image.

The issue is the Seagate drive is listed as an "unknown device" under Windows 7 Ultimate OS (along with 3 other volumes) despite the fact it works OK when I boot Windows 7 Home Premium. Haven't gotten Windows 10 to boot yet, so don't know about that, but its just fine under all of the Linux OSs too.

I have all of these backed up using Macrium on a 3TB external USB also.

All of the UUIDs for each disk and partition (volume) are unique as reported by gparted under Linux. Having an issue with Windows 10, but I'm saving that for a separate thread.

The Seagate was showing up OK before the FW and RAM update. I may have confused the Win 7 Ultimate OS when I had to remove the CMOS battery to reset mobo, and I forget to switch the SATA ports to AHCI mode. Win 7 Ult. booted up, but many volumes weren't recognized. When I discovered and fixed the move 4 items shown as "unkno... Read more

Read other answers

Hi Friends
in my win7 i have this unknown device

i have another windows 8.1 and there is no unknown device. this means It's only in windows7.

please help me to solve it. because i think this problem bring some error in HDMI.
when i use Laptop I haven't any Lag, but after connect with HDMI to TV, Lags appear.even in Game & Movies.
& ONLY in windows 7. no in windows 8.1.


A:"Universal Serial Bus (USB) Controller" Unknown in Device Manager Win7

Friends i solved it. it was USB 3 bug. i again install usb 3 driver , restart windows , and ok all.

anyone know about my problem HDMI & Lags?


Read other 1 answers

Does anyone know a fix for this common problem:

My PC's (running XP Pro SP3) mapped network drives say "Unknown Network Device" but they work just fine.

Is there a way to get windows to like them as the normal "Network Device".

I ran across these other posts with people with the same problem, but didn't see any sure-fire fix listed:




Read other answers

Described here. I have a problem with finishing work on "unknown device". For a moment, after installing from the DELL (www.dell.com/.../advanced) driver "ST Microelectronics Free Fall Sensor Driver ", file DRVR_WIN_R309372.EXE Device Manager has stopped showing that there is an" unknown device "in the configuration. After updating to "ST Microelectronics Free Fall Sensor Driver", the Chipset_Driver_RCHTX_WN_2.00.10.34_A11.EXE file, from the same DELL page, again appeared in the configuration unknown device.
I decided to remove the ST Microelectronics Free Fall Sensor Driver from the system via the Control Panel to install only DRVR_WIN_R309372.EXE. Unfortunately, the installation can not be resumed, the message "Found incompatible installation of, Version. Please uninstall it via Control Panel Add / Remove Programs before installing this version of Accelerometer". The problem is that Control Panel no longer shows this application. Suspecting that there were some traces left after the previous installation, I tried to remove them from the File Manager and also edited the registry. In the registry I searched for: "R309372", "RCHTX", "Microelectronics", "AccelerometerP11". I deleted the entries containing the above characters. I would be grateful for directional guidance on how to proceed further. I am using Windows 10 64 bit Dell Precision M4500.

A:Precision M4500, Windows 10, "unknown device" problem

PiotrMak,Unfortunately, there are no Windows 10 drivers  available from Dell on the M4500 system.

Read other 1 answers

I'm getting seemingly random blue screens on a regular basis. Blue Screen View blames ntoskrnl.exe, so make of that what you will.

I no good at computer

OS: Windows 7 home premium 64 bit
Installed 3 weeks ago, when the system was built. I didn't build it, the guys I ordered it from did (hardwareversand)

Any help would be greatly appreciated.

A:Random BSOD, "Unknown Device" error in perfmon

About 1/3 of these crashes are blamed on memory corruption directly. Some of the others indirectly.

These crashes were caused by memory corruption (probably a driver). Please run these two tests to verify your memory and find which driver is causing the problem.

If you are overclocking anything reset to default before running these tests.
In other words STOP!!!

*Download a copy of Memtest86 and burn the ISO to a CD using Iso Recorder or another ISO burning program. Memtest86+ - Advanced Memory Diagnostic Tool

*Boot from the CD, and leave it running for at least 5 or 6 passes.

Just remember, any time Memtest reports errors, it can be either bad RAM or a bad motherboard slot.

Test the sticks individually, and if you find a good one, test it in all slots.

Any errors are indicative of a memory problem.

If a known good stick fails in a motherboard slot it is probably the slot.

RAM - Test with Memtest86+

2-Driver verifier

Using Driver Verifier is an iffy proposition. Most times it'll crash and it'll tell you what the driver is. But sometimes it'll crash and won't tell you the driver. Other times it'll crash before you can log in to Windows. If you can't get to Safe Mode, then you'll have to resort to offline editing of the registry to disable Driver Verifier.

I'd suggest that you first backup your data and then make sure you've got access to another computer so you can contact us if problems... Read more

Read other 5 answers


I have a dell 8400 running XP Sp 3. For some time now I have not been able to read my thumb drives. When I plug them in it simply returns "Unknown Device" error. I have deleted the usb ports and let XP rediscover them as well as having reloaded the chipset firmware. Still nothing. The thumb drives work fine on other systems and other usb devices (printers keyboard & mouse) work fine. Any ideas out there?

A:USB Thumb Drive -- Returns "Unknown Device" error

I'm assuming you've tested other USB devices in the ports, and the ports do work?

Have you checked the Removable Storage section in Computer Management?

Read other 2 answers

My Windows 8.1 is trying to run Device Set Up Manager User Task Handler. It's been over a couple of hours. The progress bar is not moving. The issue started while updating/installing my windows update software. I haven't received any error messages. The computer model is Inspiron 5537.

Could I perhaps restart my computer even though the Device Setup is still running?

A:Device Setup "Installing device" taking too long. Now what?

Absolutely restart, that's always one of the first troubleshooting steps to take.

Read other 1 answers

I have a BIIIIIIG problem with my Epson DX5050. The message "Unknown Device" is received when I plug the device in the laptop through the USB port. I tried every single method described on this forum (and other). I don't know what else to do.

The device appears as an Unknown Device in the Device manager no matter what I do (printer on, printer off cable plugged, unplugged).

I really don't know what to do. PLS help.

I have a Compaq Presario V2000 with an AMD processor and 2 USB ports both of witch are working with other devices.

I didn't find the latest drivers for the motherboard (on the official web site) as was suggested by an user (All may USB items under "Universal Serial Bus Controllers" are standard after i Installed everything on the DVD that came with the Laptop).

Do you guys think it could be the cable? (the cable is brand new)

I need your advice badly or this thing is out the window

A:Epson dx5050 recognised as "Unknown Device"

Read other 9 answers

My USB stick has suddenly just started saying "unknown device" when i plug it into my laptop. i don't know why it's suddenly just started saying it, but i've plugged it into my brothers laptop and it still says the same thing. I have no idea what to do and all my gcse work is on it and i haven't got it saved anywhere else so i'm really desperate for a solution. PLEASE HELP ME :'(

A:USB Memory Stick just started saying "unknown device"

How is it reported in Disk Management ? ?
Right clik My Computer...select Manage...then Disk Management...
Right clik the USB stik and select Properties...
If it says "RAW" then it's been unplugged prematurely 1 too many times and your data may be gone...

Read other 1 answers

My ATI Mobility Radeon 9600 is showing up as a unknown device in device manager and i can't install the driver because it wont install a standard VGA driver

A:Graphics Card Showing up as "Unknown Device"

Hi, welcome to the forums

Are you sure it's a 9600 GFX card? The ATI/AMD site has no mention of anything above the 5xxx series of Mobility drivers?

It seems all info I find on the 9600 relates to XP as the latest OS for it, how old is the machine?


Read other 6 answers

My neighbor used the format command on his Compaq Presario 2240 and I installed Windows 95 on it. In the Device Manager I have "!'s" by "ESS ES1688 Audiodrive" and under "Other Devices" an "Unknown Device". There is no sound on this computer. In the ESS ES1688 Audiodrive Properties, under the Resource tab, it says the resources the device is using does not match any of it's known configurations.
Also, there is one under System Devices: "PCI Universal Serial Bus". From what I understand , this is the chipset driver that needs to be installed correctly, but I am unable to find it.

A:Solved: ESS ES1688 Audiodrive and "Unknown Device"

Read other 13 answers

Hello everyone. Please assist me in fixing this issue.

I have already installed and ran DriverMax. That did not help.

Would appreciate any input, thanks.

A:need help fixing this "unknown device" pictures added

Hi IvoryPearl, welcome the the forums.

Have you tried right-clicking the device in 'Device Manager' and selecting Update Driver Software?

Read other 9 answers

(Please tell me if I'm in the wrong area of this board)

But a friend living hundreds of miles away uses XP and ran an "unasked for" Pop-Up utility that said he had computer problems because of malware or spyware some unnamed entity had installed on his computer. Unfortunately he doesn't remember the name of the "so called spyware detector/remover", but he fell for the "Warning" and ran the program to "check" his system.

Of course, as most those unrequested detect/remover programs do...it found many "so called serious" problems. But would Not "fix/clean them" unless he payed for the program.

From THAT point on, his CD-ROM wouldn't work(which it had dependably always before)....the Device Manager that it "is there" and what make/model it is....and also says that it is enabled and working properly(but it isn't working, as before). And the Icon disappeared from from the My Computer folder. I guess that program somehow did something to it, in order to force people to pay for the program to "fix it" and othe so-called problems!

Has anybody ever heard of this?
Can you help me get his CD-ROM accessable and working dependably as before? Please??


A:CD-ROM shows "This device is working properly" in Device Manager, but doesn't or show

Read other 8 answers


I have a new Lexmark Pro200 series wireless printer. I have it installed on our home wireless network and can print to it fine from two separate Vista laptops. On an older Dell XP (SP3) desktop machine, however, when I try to install the Lexmark printer drivers from their CD, I get an error. The full text of the error is:

"Failed to create print object Lexmark Pro200 Series (Network). The specified port is unknown."

The error appears near the end of the installation process. Also, no printer icon shows up in Printers and Faxes

The first thing I did was contact Lexmark technical support. They tried several things but to no avail, including doing an uninstall and cleaning of any Lexmark drivers, disconnecting and reconnecting the printer via a USB cable (not needed for normal operation), and reinstalling the drivers a couple of times. They said the cause of the problem is something wrong with the Spooler Subsystem Apps and that I would need to repair or update it.

Any ideas how to do this? I've got some decent tech skills and am comfortable doing minor tweaks in the registry and such.


A:Error when installing printer: "the specified port is unknown (1796)"

Read other 16 answers

My Toshiba Satellite M70 laptop shows the following in the Device Manager (Connection View)

Microsoft ACPI-Compliant Embedded Controller
? Unknown device
? Unknown device
? Unknown device

At the same time, whenever I plug any USB device into any of the three USB ports the computer freezes and has to be manually rebooted. The Windows Task Manager using CTRL-ALT-DEL can't be accessed.

The Device Manager says the USB ports are working normally.

I have updated the drivers but continue to get the same results. The update terminates with a message that a driver can not be found.

Other than not being able to use the USB ports the machine works fine. Thank goodness for "cloud" backups.
On line searches have produced no clear solutions. Any help would be appreciated.

A:MS ACPI CONTROLLER --"Unknown Device"

That's a core Windows component. You can try using Windows update or you can possibly just uninstall the device, reboot, and let Windows install the drivers. Aside from that, you will likely need to perform a Repair install (if you have an actual Windows CD) or a Restore.

Read other 1 answers

Hello all, I have a Alienware M18x R2 that is displaying an "unknown Device" in Device Manager.
Here are the specs:
i7 3920
32GB 1600Mhz RAM
2 x GTX 680's
2 x 1TB Western Digital 5400RPM HDD's
Bluetooth 380
Killer WiFi
Win 8 Pro 64Bit
BIOS version is A09
This particular "Unknown Device" does not appear with a Windows 7 O/S
If I use Windows 7 and install all the recommended drivers there is no problems, the "Unknown Device" in question does not even appear with Windows 7 running, I have done a clean install of windows 7 and checked every device ID in device manager before installing anything else to see if I could find the one causing the problems in Windows 8 - It is no where to be found
As soon as I Install Windows 8 and check the device manager, then this particular "Unknown Device" appears again, even after installing all Windows 8 recommened drivers it is the only "unknown" left.
I have tried searching the internet using the Hardware Vendor ID and Device ID provided in the details section of the "Unknown Device" but cannot find one useful entry, even using the Vendor and hardware databases has been a waste of time
Here is the Device hardware ID as it appears, three lines in total, but I think only the top one is relevent.
Any help would be great.

A:M18x R2 Windows 8 "Unknown Device"

I am having the same issue with an M6700 system. Any help would be appreciated.

Read other 6 answers

Upgraded to Vista a few days ago, on the lower right taskbar where the double displays are it said I had no connection. I checked to see that my adapter was plugged in – It was – Step by step I tried to open the wireless connection – None shown – Tried to do a repair – No dice – Went into Control Panel – Device Manager – Network Adapters – It showed the Linksys adapter – Tried to update driver – The best driver for your device is already installed – At this point in went back to Control Panel – did an uninstall of Linksys wireless adapter – after finishing I restarted the PC – Inserted the Install CD – after install directed to connect the adapter – However double PC display on task bar still states I do not have a connection. I go back to Device Manager – Network adapters – It is not there –However I noticed under other devices that it shows a device that is unknown – I click on properties – Linksys Wireless G Adapter – from there I update driver – Now under Network adapters it shows Linksys Adapter – There is no longer anything under Other Devices – My task bar shows I have signal – Problem solved??? – Temporarily yes! – However every single time I shut down and log back on – I have to repeat all of the above steps – This is getting really annoying and I just don’t know what to do at this point – I am hoping that someone can help me figure out why I only have a problem after Windows does an update!

A:Links Wireless "Unknown Device"

First off, don't fool with the fonts to make them so small us old guys can't read them!

Next, how about a paragraph or two, it's almost impossible to read the tiny type, add to that the amorphous blob of text, and it's even worse.

Read other 1 answers

"Unknown device" 2 yellow question marks in ctrl panel/system/hardware/ device. Is there a simple way to identify these units, so I can install drivers? I hate them.


A:"Unknown device" repair required

Sure, Try the Unknown Device Identifier.

Read other 6 answers

Recently I have not been able to access my flash drive from the USB ports. Whn I check the device manager I can see the drive but it is listed as unknown device. What would be a good fix? I am using XP.

A:USB Flash Drive "unknown device"

Read other 8 answers

Hello I`m new here, I searched this forum for something similar to my issue but didn`t find anything.

I have set up an old PC for my daughter for learning and playing reasons (older games).

I couldn`t find any driver for my motherboard for windows 7, so I used vista 32bit instead.

My issue is, that one internal usb-port had not been recognized by system, status is "unknown device, code 43". The chipset driver are installed, everything else too.
My system is:

motherboard: ASUS M2N-MX bios:1004
Graphics: NVIDIA 8600GTS PCI-e
cpu: AMD Athlon x64 4050e

all on Windows 7 Enterprise

The funny thing is, that all outside ports are working properly, all internal except of this one (Port_#0005.Hub_#0001) also.
On this board no device is connected, the only usb-device now running is keyboard and mouse.
Coud ther be an issue with windows 7 and usb/power management?

A:internal USB port μs "unknown device"

Welcome to SF!

You tried to solve the problem via Windows Update?!
Have you tried uninstalling the device and reinstall it?! If you have not tried,
right click on the device marked as unknown, go to properties and then to the Driver tab. There, click uninstall. If asked if you also want to uninstall the driver, uninstall it. That done, reboot the system. Windows tries to install the device again - I recommend that the PC is connected to the internet during this process.
If in any case the problem persists, download the drivers compatible with Windows Vista here: ASUSTeK Computer Inc.

Let us know the results!


Read other 9 answers

Hi, I'm new to the forum.

I downloaded Avast! 5.0 today. While completing installation, a window popped indicating that my system recognized new hardware and required a driver. I cancelled out of it; continued with installation and completed serial number installation.
On rebooting, the system again recognized new hardware and wanted the drivers.
An annoyance, so I went into device manager and saw that I now had an "unknown device" listing. When I sought more details, it listed the device under Device Instance Id as ROOT\LEGACY_AVAST!_ANTIVIRUS\0000

How do I remove this "Device" and could there be consequences for doing so?


A:New software created "Unknown Device"

think its scanner driver so you should not have cancelled out of it , if you reinstall avast it should give you an option to repair if not just reinstall it

Read other 3 answers

HP Pavilion dv5
Core 2 duo P7350 @2.00ghz
4gb ram
Vista Home

I get an unknown device warning in my device manager. It is for my graphics card. I click reinstall driver. It finds the driver but says it encounters a problem when installing. Its says: Nvidia GeForce 9200M GS access denied. I downloaded new drivers from Nvidia, installed them, restarted, no good. Tried uninstalling the device, restarting, installing driver = no good. Any thoughts?

A:"Unknown device" -can't find Nvidia

Hi Panzer 25, if you right click on your driver installer and select properties then general tab is there an option to "unblock" ? if there isnt this isnt the problem otherwise all i can suggest is downloading the latest HP distributed driver as they are modified to suit your machine HP Support & Drivers i know with my laptop i have had trouble with Nvidea drivers & always had to use the HP distributed ones

If you dicide to go with the Hp drivers download the Chipset & Graphics drivers & save to your desktop

Disable your resident protection (antivirus etc)

Uninstall your graphics driver first & reboot

Then your chipset driver & reboot

Then install chipset driver first & reboot

Then your grapics driver second & reboot

Renable your Resident protection

(When running the installers right click on them & select Run as Administrator)

I hope this is of some help

Read other 10 answers

I have been using my flash drive until about two weeks ago when now they are recognized as flash drives. When I look at the device manager, is says they are "unknown device". What can start this and what is the fix?

A:USB Drive listed as "unknown device"

The drivers could have become corrupt...try reinstalling the drivers for that FLASH Drive

Read other 2 answers

In my new Windows XP installation, I am getting the Unknown Device found" at startup and cannot get rid of it.

I tried letting it find it's own drivers and it did not find any. Next, I put in the CD's that came with my motherboard, video card, and monitor and apparently, it is not part of any of them.

The message they give does not even give a hint about what type of "device" they have supposedly found so it does not really do me any good.

I removed the unknown device through the control panel but it came back.

Is there software somewhere that will identify what Windows is finding?


A:"Unknown Device" found at startup

Try this:


Read other 1 answers

I don't know when and how i got these two unkown devices in Device Manager. I tried to update them with automatic updates over the internet and with some CDs but failed. I hope someone can help me resolve this problem.

A:Troubleshooting "Unknown Device" Windows XP

Make sure all your devices are connected and powered on
Click Start->Run, enter: msinfo32. Click the + sign next to Components to expand it
Click Problem Devices. Anything appear?
If yes, click on it, Ctrl-A to select all, Ctrl-C to copy it, Ctrl-V to paste into next post
On the other hand, if no devices are listed, tell me so


Read other 9 answers

I working in a company with approx 800 computers on hundreds of locations and to often the peripherals such as printers, scanners and keyboard end up in state "Unknown Device" and I have no clue of why!
Some info:
- The are different drivers for the various peripherals
- It is HP computers with PosReady 7 x64 installed on it
- The network is limited so they can only access certain webpages, therefore driver installation from windows update is not working.
- This happens to computers that are heavily used and for those are not.
The "Fix" is sometime to just plug out and in the USB-connector or in case of a printer, just reboot it and sometime you have to reinstall the drivers. After that it works but it comes back again after a while. Happened to ~70 computers so far...
I have no clue how to troubleshoot this? Any ideas how to start troubleshoot ? Where to look? I can't reproduce the problem in a lab!

Read other answers

I have a vista basic toshiba laptop (the one I am using now) and I have "unknown device" listed as one of my 4 usb hubs in device manager and I can't get rid of it even when I delete that one and the other hubs and do a restart in safe mode. I think the problem first occured what I connected a .99 cent usb cable I bought from the dollar store to my printer. I see that they say update your usb drivers on the internet at different sites but I am waiting for my credit card application to be approved to pay for "Driver Detective" on the internet hoping it will fix my usb issue. I did a system recovery and the "unknown Device" is still listed as one of my usb ports with nothing connected. I also get the message that, one of the devices connected has malfunctioned and windows does not recognize it, popping up when no usb device is connected to my laptop. I am wondering how to update the usb drivers if the port is labeled "unknown device" in device manager and where I can get free ATI usb driver updates to install and see if that solves my problem. I was told by the Geek Squad of Best Buy that I have a problem with the motherboard but I am hoping that is not so because he could not prove it to me.

Thank You; Ron in distress.

A:Usb root hub assigned name "unknown device"

First don't buy any drive detecting software below is a link to a free one


Second although I Hate Geek Squad for being incompetent they may be right this

time which is rare. The link above will let you see the devices installed on your

computer if you have any question's post back

Read other 8 answers

Hi -
I'm trying to install XP Pro onto a brand new SATA hard drive since my old one seems to have gone kaput after about 5 years.

I booted from CD, and went thru all the screens to the point where it was ready to start the installation. When i got to the screen to partition the "mass storage device", i got the following:

Unknown Disk
(There is no disk in this drive.)
Unknown Disk
(There is no disk in this drive.)

So i found an old post on this site (http://forums.techguy.org/hardware/823885-solved-unknown-disk-error.html) and followed the lessons learned there, and realized I had a floppy for a RAID DRIVER i had forgotten about (it came with the components I bought to build this box). So i tried the installation again, starting from a reboot, and hitting F6 at the right time. When it came time to install the 3rd party driver, i inserted the floppy as instructed, and hit Enter. The floppy light came on, but i don't believe i heard it do anything, and the screen asking me to insert the floppy quietly came back.

I tried a couple times, but still the floppy did not do its magic. I continued, and the partition screen still showed the Unknown Disk error. So as suspected, the driver did not get installed. I then rebooted, this time hitting F1 to check out the BIOS. My BIOS recognizes both my new hard drive and the floppy drive just fine, and the floppy itself can be read just fine on another PC.

Could this be a floppy controller problem? is there a simple w... Read more

A:Can't get past "Unknown Disk" problem installing XP Pro - floppy drive issue??

Read other 16 answers