Recently I've been having this problem happen regularly where when certain programs run my mouse acts funny and constantly moves to the bottom of the screen. I have no idea how to fix this aside from completely reinstalling the OS, which I want to avoid. As far as I can figure this bug occurs when I'm running certain windows applications such as the accessories magnifier and windows setup wizard. I'm not sure how else to explain this bug or where to look for help so if you want me to post certain specs or what-not of my computer say so and I will post them ASAP. Also I installed a random game ( Lost Saga hosted by OGPlanet ) and it has the bug even when running the game. Thanks for the help.