Did noone read my post? Every optical mouse I have ever owned refuses to cooperate with me. The pointer thingy keeps shooting to the corner of the screen and sticks there. This has happened, without fail, with every computer and every optical mouse I have ever owned. They SUCK. Ball mice are just fine. They have never been "clunky, slow, unresponsive" or "work-intensive". So quit the frickin' salesman routine.