Ok, I cant figure this one out at all. I have a system that was working fine in the old HP case that I had, I've changed everything in it except the Mobo and it was working fine in the old case. I setup everything in a new case and everything is working fine, except the mouse. The bios doesnt detect the PS2 mouse I plugged in but when I plugin my USB mouse it gets detected fine but still wont work once windows boots up. I've scratched my brain on everything even unplugged the front USB ports but still am unable to figure this out, and feel it's probly something stupid I'm over looking.