This problem has officially pissed me off. I first encountered this problem two days ago. Basically, whenever I go in some sort of game, the game thinks my mouse is going to the top left corner of the screen. It's happened in numerous games so I figured that it was the mouses fault. Wrong! I bought a new mouse and tried putting them into varies usb ports and downloading the mouse's unique software, but the problem still occurs. I have even tried the virus scan but that hasn't solved any problems either. My last solution is to do a system restore, but I want to try and avoid it. Is there any other solutions you guys know of to fix this problem? Or should I just do a system restore?