Cursor jumping around when the mouse is moved?
Before trying all the exotic cures prescribed on this site, simply change or clean your mouse pad.
A quick check if this is your problem: Move the mouse to a clean spot on your bare desktop and test it.
I clean my pads with water, a dab of dish soap, and a stiff brush. You will be amazed at the filth that comes off the pad and turns the sink water to mud. Rinse well, squeege off the front and back, then hang the pad up to dry for a day or two.
Hope this cure works for you.