ok i plugged in my midi controller via usb, and windows didn't detect it. i tired to plug it in again, and i accidentally knocked my wireless adaptor out of its pci slot (it wasnt screwed in because i'm lazy/stupid). no big deal, i'll shut it down and put it back in. well now i can't boot at all. it gets to the screen where i can choose how to boot (safe mode, etc) and when i choose one it freezes up. i put in the windows xp disc and it loads until it starts windows, then it just freezes again. can someone help me?