Well, this is what I get for using an MS product... I had really liked my MS bluetooth mouse up until it decided not to work today. Worked fine at noon when I first turned the computer on... when I came back at 3, nothing. I've tried 3 sets of batteries, so that's not it. I've also tried changin the channel on which it connects and that's not it either. The light comes on on the mouse, but the computer doesn't see it anymore. I also know it isn't the bluetooth module on my computer because my apple BT keyboard works perfectly.