I have a computer that no longer works with USB mice on a Windows XP computer. I have tried multiple mice with it, and thumb drives and other USB devices work just fine. I have already tried doing a repair install twice with different service packs on both discs, as well as running Re-image on it. I even went in and manually copied over the files that the mouse is trying to use from a XP install disc in Recovery Console. Any other suggestions besides formatting the computer?