If anyone runs across this problem, there is a simple way to correct it , if the pad was inadvertently turned off, first find the key that turns off the mouse, it is on the top set of keys usually looks like a finger on a pad, on mine it is F7,different for other makes. then at the same time press that key and the F2 key, just found this on Yahoo, I didn't even know there was a button to disable the mouse. Got all kinds of answers from others on Yahoo, many saying it was unfixable and this one person had this procedure and it worked. Probably this is one of the more common reasons why the mouse stops working. Hope this helps anyone in the future.