i have dell dim051 i,ve had it for over a yr now never had any problems with it until about 2 weeks ago my mouse has been acting crazy it shoots all over the screen. ive scanned every thing no virus ro spyware everything is up to date drivers and all ive unpluged the mouse uninstalled it and stil the same thing acting irratic all over the screen .....
What kind of mouse? Ball or optical? If it has a ball, turn it over and gently turn the ring around the ball (look for the arrows) to open it. Remove the ball and clean out the dust bunnies from inside. There's ususlly 3 rollers inside that get gunked up with dirt. Don't use any liquids to clean inside the mouse.
If this is an optical mouse, try wiping the surface cover over the LED on the mouse's bottom.
And try a different mouse pad too because they're is a common cause for wandering rodents.
Ron Edit: I hate it when ravik types faster than I do!