Here's a good test of your skills...

[BillMoney]

Try booting to a pe environment and using a offline registry editor to try fixing kbd classes

 

[xpert71]

hi

did u check the hard disk for bad sectors?
try restore the mbr.
clone the hard disk to another hard and do a factory restore.
and finally maybe the southbridge is failed.

 

[Easy Pc Repair]

Was there any antivirus such as Kaspersky installed on the machine? I uninstalled Kaspersky the other day on a clients computer rendering its USB support to malfunction. I had to resins tall Kaspersky and us the Kaspersky removal too. Also I have a network shared drive and host driver pack solutions, I would copy the entire folder to the clients computer ( because the program doesn't support running from unc paths) and try running it. Maybe it's an outdated driver?

 

[geekhelp4u]

@Geekhelp4u... Can't access Windows to uninstall or install anything.

using the MS DaRT disk you should be able to access the driver settings and make changes

 

[Jeffreynya]

This will sound even funnier than the trying new keyboard and mouse. How about trying a USB to PS2 adapter?

 

[GeeksInKhakis]

Boot with offline password editor and remove password or enter default username and password and enable auto admin logon to get past the logon screen.

 

[Tech in SC]

Thanks everyone but I had to nuke it and reinstall. I ran out of time to try to repair it. I tried everything listed by everyone here but no cigar! It would've been much faster to nuke it from the start but I prefer to actually repair PCs. Its always a great learning process.