Mouse and Service Pack 2

[muffins]

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.

[hybrid101]

ummm...update the drivers?

[muffins]

Tried that. Didn't seem to work. I found out that there is no longer a Mice tree on my Device Manager list once I upgrade to SP2. That might have something to do with it.

[Anogar]

Does no mouse work, or just not that one?