Programs just pop up

Question

when I'm working on my Toshiba Satellite P30 all of a sudden the calculator just pops up. then outlook will open. then my computer from the start program. then another program. They just start on their own. Letters may type themselves into something I am typing. I have read about the shutdown problems, which I have, but have not seen anything about this. I use anti-virus, firewall and spy-ware on my computer. I have also run scans and am ok. Any idea's? Thanks...vb