Hah, my friend was using this mouse and for months his computer would lag really bad after a couple minutes of playing any game. We both tried to diagnose the problem for months because we were trying to play Borderlands 2 co-op but his FPS would always drop to single digits. We never really thought a mouse could be the cause of that but it turned out it was the Spawn mouse doing it all along. It was his own fault for not updating the firmware on it, but still. It was pretty ridiculous. I told him that it if it was me I would have gone Office Space style on that mouse and bashed it to pieces with a hammer.