content: I purchased this mouse. I installed it and noticed the mouse pointer would move suddenly all around the screen. I looked the problem up at the Microsoft sight and they gave me a page of about 35 registry changes which I had to make to try to correct. The changes had to be made after you un-installed the driver, hence you had to work with out a mouse. What a major ordeal. Many other people had the same problem. The fix they gave me did not work. I just bought a logitect laser mouse. Microsoft needs to get their act together on this mouse. I can not recommed it to anyone.