I'm using a Microsoft Wireless Optical Mouse Blue, at least I was until it was dropped on the floor. The red light under the mouse is still flashing with each click, but the cursor does not move on the monitor. I even put in new AA batteries but still no response. Nothing appears to be broken. The receiver's light is working, and there appears to be no problem there. If anyone has a suggestion on how to get this mouse working again, I'd appreciate hearing from you. And Happy Thanksgiving to you all!