Alright, here's the deal. I have a USB Optical Mouse from Logitech and I run Win XP. Problem: recently, though this has never before, my mouse would stop responding for a moment, the light would go off, and my computer would make that sound win xp makes when you plug in a new hardware. Then it would just work again only to happen again a little while later. This is completely randomly and if I plug the mouse into another port the problem is still there.