I just recently was having some Internet Explorer problems so I uninstalled Windows Service Pack 2 and then reinstalled it, but now for some reason my MX510 (mouse) isn't working with Service Pack 2. The mouse is optical so I see the red light on when its booting up, but once it gets to the Windows XP Professional screen it shuts off. Right now I'm on Service Pack 1. Any clue whats wrong? Thanks.