Mouse wont work and yellow exclamation mark in device manager?
 

Do you know a quick fix to the problem my other computer is having?

1. Get a new mouse
2. Try switching the plugs (put the keyboard into the mouse port and visa versa)
3. Try to remove it in your system manager, reboot and see if it finds it
4. Format your drive and start from scratch
5. Get a new mouse

The mouse works, I already tested it on another computer. It's on a run down Windows 95 computer by the way.