i have a microsoft optical usb mouse and up until about 2 days ago it had been working perfectly. Now it stops responding for some unknown reason. ive tried unplugging it and then plugging it back in but this doesnt always work and more often than not after plugging the mouse back into the usb plug the base of the mouse doesnt light up. Has anyone else struck this problem? or know how to fix it? Thanks, edit: btw im using windows xp pro if that helps.