Mouse cursor moving by itself (by 4 users)

I have the Compaq Evo N610C

I am using the touchpad and at random points the mouse cursor on the screen will move automatically to the left and then to the left corner. I disabled the touch pad to see if that made any difference and also the pointer (pad) afterwards but made no difference. I have also updated and reinstalled drivers. In fact for a different reason the entire OS has been reinstalled.




Mouse cursor keeps moving all over the sceen. It works ok.for 1 second then starts moving around. I checked for viruses it is clean. I tried another mouse still the problem.

mouse cursor moves by itself