No Mouse or Keyboard

I am having trouble getting my new mouse to work right so I went back to
my previous one. After installing it I rebooted, then neither the mouse nor
the keyboard will work now. Luckily I have a dual boot system and the other
OS works just fine so I know it's not a hardware problem. I have tried the
Last Known Good Configuration option during bootup and that doesn't work. I
have tried starting up in Safe Mode and that doesn't work. I believe a
system restore would probably work but how to get to it without a mouse or
keyboard? Please help! I really don't want to have to reinstall XP to
solve the problem!

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