I dont know how to explain this well so I will do my best.

I have a Toshiba 1750 Satellite Laptop running WinXP (came with 98). It has a "pen" mouse, that is a mouse located between the keys G, H and B. Often times it just starts to move in a straight line across the scree, and im not touching it or the laptop. This is a pain because I have to move the mouse harder to get it to do anything. Plugging in a USB mouse doesnt fix the problem. Any body have any ideas?