For about a year I have had a logitech MX518 mouse and it worked fine, but recently it stopped working. All of a sudden it stopped working and would keep connecting and disconnecting. When I plug it into another computer, it works fine, but when I plug it into my computer my computer makes the sound of something being plugged in, and then something being unplugged and keeps repeating those sounds. I tried to reinstall the logitech drivers and I eventually reformatted but nothing has fixed the problem. I have a ball mouse that works perfectly(besides being a horrible mouse) but my logitech mouse does not work at all. I also have an older logitech(dual optical mouseman or something) that does the exact same thing as the 518. When I plug in the mouse windows recognizes it, but it fails to install. Any help would be appreciated. Thanks