2 days ago my XP SP3 notebook decided it didn't like USB mice. I've tried several standard USB optical mice (2 button + wheel) to no avail. These mice work fine on other notebooks/desktops. When I plug a mouse in, it detects the new hardware, and sees it as "USB PS/2 Optical Mouse." XP searches and can't find any compatible drivers. It used to work fine with the standard "HID compliant" mouse driver. Now, nothing. I've tried all the drivers I can find, I've even re installed the original drivers.cab file from the XP Pro install cd....nothing. Any suggestions? Thanks!!