dead mouse and keyboard - virus?

My boss's computer suddenly had the cursor move to the middle of the screen and freeze. The keyboard is also not working. They are USB. There is no PS2 port on the computer. I've switched to a different keyboard and mouse, and have tried all the USB ports with no luck. They work when I am in the BIOS settings, or if I use a boot disc. But in windows XP, and safe mode, they do not work.

I ran the free AVG boot disc virus scan on it, and it did not find anything. I also tried running some of the programs from Hiren's boot disc, but only a few worked - most give errors. I downloaded the Avira boot disc, and it returned the following:TR/Crypt.XPACK.Gen3. It said it renamed it. I have also downloaded and run the Kaspersky rescue disk. It did not find anything.

I'm at a loss on how to approach this, since of course, when it boots normally, I can't do anything without a mouse and keyboard.

I don't know if it's a virus, but I don't believe it's a hardware problem.

Help!
JoAnne

PS: the computer is not frozen. XP loads, and the email program opens and downloads email. It's just the USB ports or mouse and keyboard that don't work.

 

I'm working my way through the list...
Avira: found and renamed TR/Crypt.XPACK.Gen3
AVG: found nothing
Bit Defender: I ran this from a CD. It found gen.variant.kazy.9786, and says it deleted it.
F-secure: locked up at 78%. I will retry it later.
Kaspersky: found nothing
DrWeb: (i know, it's not on the list) still scanning - will update this post tomorrow...

 

Yay!! I've fixed it. I suspect that a USB driver was infected, and then one of the scans deleted it, but I don't know this for sure.

Anyway, from my (good) computer I copied these USB drivers onto a flash drive.
(c:\WINDOWS\system32)
Hccoin.dll
C:\WINDOWS\system32\drivers)
Usbehci.sys
Usbhub.sys
Usbport.sys
Then I booted with Hiren's cd - mini windows XP, and copied the files to the appropriate locations on the messed up computer. On three of them, it asked if I wanted to overwrite (I did.) but on one of them, the file wasn't there (that's why I suspect a virus scan deleted it.) Once that file was put back where it belonged, I rebooted, waited while it found new hardware, and voila!

Hope this might help someone else, someday.


joanne