undefined When I am typing any document my cursor keeps jumping all over the place. This same thing happened to me once before when I had Win. 98. I have a laptop and what also happens conjointly with this problem is when I plug in an external mouse it will not operate independently of the built-in mouse. I can move both at the same time. When it happened before with Win 98, they sent me a service pack. I now upgraded to Windows XP and it is now doing it again.