PS/2 keyboard fails when Windows starts

By aspleme
Mar 20, 2009
  1. 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?
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    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
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