jmessiaen 0 Newbie Poster

My laptop is a Dell Latitude D800. For some time now, the mouse cursor suddenly startsq running up or down for some seconds, and then becomes 'normal' again. Changing the mouse or disabling either the the mouse-pad or the mouse-button (or both) won't help. Anyone
a splendid idea? Would changing the processor be of any help???
Thanks!