PS/2 keyboard fails when Windows starts

[aspleme]

I have a PS/2 keyboard that has always worked fine. Yesterday, I rebooted my computer and when I got to the login screen, I was unable to type in my password. When I try to edit things in the pre-login area (it's late... I forget the proper name) either changing my BIOS settings or the using the 'command prompt?' (looks like Dos) the keyboard responds just fine, but once it is actually trying to start Windows, it fails... even the numlock key won't change the light anymore.

It sounds to me like something might have managed to alter the Windows driver for the keyboard... but how can I fix this without completely reloading Windows and possibly losing a good bit of data?

 

[kimsland]

Get a USB keyboard?

Or just try this:

Startup your computer
Press the F8 key before Windows starts
Select Safe Mode

Log into your Administrator account in Safe Mode
Click on Start->Run-> Devmgmt.msc ->ok
Once Device Manager opens, expand your keyboard + sign
Right click on your keyboard and select remove
Restart normally

If this still doesn't help, you may have Malware (Virus\Trojan etc) infection
You can use an excellent free Boot CD like UBCD. Info here
Using this CD you can scan for Viruses (and even back up your data)

Ideally we would like you to follow this guide: UPDATED 8-step Viruses/Spyware/Malware Preliminary Removal Instructions
But that may be difficult, if your keyboard won't allow log on