Hmm...It's certainly not a problem I've heard of. Now its starting to sound like a software problem. It might also be that something (like a wire) is loose inside the computer, but I don't see why the mouse would affect that... If that is the case, though, you might have to take it to someplace that fixes computers (I think Best Buy does). Anyway, back to software...
Can you remember if you did anything (visiting an odd website, installing a new program, changing a setting, etc.) that you don't usually do with it before the problem started?
My suspicion now is that you have some kind of virus or spyware (because that's always my suspicion when strange stuff happens), but I've never heard of a virus affecting hardware... I suppose it could happen.
Here is a list of free programs, including virus scans and spyware protection that you can look into. They might just fix something.http://www.bleepingcomputer.com/forums/topic3616.html
I use Spybot S&D and Ad-Aware, and they both work well. I'm also going to try to get someone who might know more about this problem than I do to look at it.
PS: It might be helpful for you to give some information about your computer, such as brand, model, operating system, and security programs.
Edited by Lanscader, 03 January 2006 - 10:45 AM.