Ok heres the problem, my dad has this really old computer, we are talking 5-6 years old that he refuses to upgrade. Its a pentium 2 400 mhz, with 64 mbs of ram. He is running windows xp on it (by some miracle) and has been for the last year or so. This morning when he turned it on everything loaded fine, but the mouse would not move so I plugged in a different mouse, which would not work (would it be because it is an optical mouse?). Is this a problem being caused by just the mouse or is it something else?