I've had some trouble with the mouse freezing at the log in screen
before. Restarting Windows has always seemed to help. Might be that the
keyboard hasn't been working either, I'm not really sure about this.

The problem just got worse. Right now this happens at every start up
and neither cold nor warm booting the system helps.

The mouse is a PS/2 and the OS Windows XP with SP2.

Please help me out here!

Thank you,