2004 Gateway on Windows XP. OK, now that you are done laughing I will tell you my troubles. Mouse may work for a little while, then quit. If I unplug and replug it, it might work for a while or it might not. Same story with a different mouse. I keep it as an extra computer as it has lots of pictures and saved files we want to have handy. It is also hooked to a very dependable printer. Any help would be appreciated. Thanks!