Ok this is a strange bug and I can't even fathom what to do about it. Basically the other day while playing Bad Company 2 my computer crashed. No problem since I know BC2 can do that. I rebooted and went about my day. Well yesterday I tried playing BC2 again but noticed every time I right clicked to aim my mouse would rocket up and to the right. Thinking maybe it was a Steam issue I installed the game by Origin but it gave me the same problem. I've tried swapping with 2 different mice but they all did it. So then I restarted the computer and tried again, same result. Next up was to test other games. I tried Mass Effect 3 and Oblivion and they both do it. The kicker is I started noticing a pattern in the jumping. If I was moving my mouse up even just a couple of pixels then it jumps up. If I was moving right it jumps right. However it will never jump left or down. If anyone can help me I would be very grateful.
I recorded a video of the bug happening. http://youtu.be/69VQab1k6R4 This video was taken on a brand new 5 button mouse with the dpi setting at 800dpi and mouse sensitivity turned down ingame as well. I have tried 2 other mice as well and all 3 do this. As I said this bug is repeatable in all my games. It doesn't happen at game menus or at the windows desktop.