Mouse snapping to bottom right of screen

Hey guys

i have a problem with my imac, the mouse pointer keeps snapping to the bottom right of my monitor, i can move it but a second later it snaps back to the same position, i have tried two mice so im assuming its not a hardware problem. A restart did not fix the problem.

Any help would be great

Thanks

 

Ignore me!! Forgot my tablet was plugged in with the pen resting on top, sorry for wasting peoples time!

Delete post if possible.