[Crispy's Critter]

Hey guys, I'm having a problem with my mouse cursor on my laptop. What's happening is that basically the cursor gets stuck/jumps around. This happens with both the pad and when I hook up a usb mouse. Basically it's fine if it's just mousing over the desktop, but if I open anything at all such as a browser, or even just mouse over the taskbar it starts freezing/jumping. I've used enditall to close down everything but essential services one at a time to see if I could find what's causing it, but that didn't pinpoint it. any advice, or anything to check on? Thanks