i seem to be having the same problem w/ my mouse lately. it only happens when you first start the computer and go to the main screen. its like its frozen. the only solution is to unplug it and jiggle the jack and plug it back in. i have an optical mouse that uses the usb port. my other mouse had an adapter so you could choose whether you wanted to use the usb or serial ports.

i'm not sure whats up w/ it, but i guess my point is did it come w/ an adapter? if not, i cant help.

oh, and if anyone else knows whats going on, please tell me. thank you