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USB ports won't recognize anything


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#1 mechem

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Posted 02 December 2010 - 09:12 AM

My USB ports front and back have power but will not recognize anything plugged in to them. Digital camera, iPod and external hard drive are all always plugged in but now are not recognized.

I checked some things through device manager and everything seems to be working correct through there. Could this somehow be virus related? I did get an AVG threat alert a week or so ago but there was no record of it in the logs and this problem started yesterday. My scans seem to come up clean. System is a desktop SOny Vaio PCV-RS610 with Windows XP SP3. Thanks for you help.

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#2 dc3

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Posted 02 December 2010 - 10:33 AM

Go to the Device Manager (Start> Run, type in mmc devmgmt.msc and click OK.

When the Device Manager opens right click on your computer at the top of the column, and then click on Scan for hardware changes.

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#3 MrBruce1959

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Posted 02 December 2010 - 10:44 AM

Although I am not 100% sure, but you may have had a file in your system32/drivers folder that was deleted during the removal of a infected file.

Most of these driver files start with the letters USB and have the .SYS extension.

One that comes to mind is USBHUB.SYS, USBD.SYS. These a only a few examples, there are more USB related .SYS files than this in the SYSTEM32/DRIVERS folder.

You should investigate the possibility of one of the .sys files related to USB as missing or corrupted.

You can try using the System File Checker by going to the run command and typing the following text.

SFC /SCANNOW

Then hit enter.

You may need the windows OS install disk for this version of Windows during this procedure.

This should replace or repair any corrupted or missing drivers.


Last solution is to make sure USB is still enabled in your computer's BIOS setup utility.
You can enter this during bootup, just before the Windows splash screen appears, hit the proper keys to enter setup.

Hope this helps.

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#4 mechem

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Posted 02 December 2010 - 06:52 PM

Thank you for the responses.

I did the scan for hardware changes and nothing found. Device manager says all USB ports are working properly.

MrBruce1959: I had not removed any files AFAIK prior to this happening. I did do the sfc /scannow and no help. I see all those USB files in Sys32/drivers but not sure what else to do. I checked the BIOS and it says the USB is enabled.

I have tried pretty much every suggestion I have found, uninstall reinstall drivers, unplug computer, even opened it up and cleaned some dust away. I'm really at a loss. Is there any way to tell if it's a virus or similar or do I just give up the ghost and attribute it to a Mobo failure...which I relaly don't think is the cause. All USB ports front and back have power they just don't recognize anything.

Any thing else to try?

Edited by mechem, 02 December 2010 - 06:57 PM.


#5 dc3

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Posted 02 December 2010 - 08:20 PM

Have you tried restarting the computer?

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#6 mechem

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Posted 03 December 2010 - 09:23 AM

About 50 times :-(

Someone suggested updating chipset driver. Any idea how to do that?




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