i've had 2 or 3 wireless mouses that have just stopped working; they make the noise when i plug in the receiver; but then they don't work at all; and they were not too long ago....?? also, they are different brands, like 2 logitech,etc....i went out and bought a new one, and it won't work either. the red lights come on all of them, like when they work, and i've tried all usb ports and my wireless keyboard works fine...so i can't figure it out. why would all mouses suddenly not work?