Hello. I am running on Windows 7, and I have a GeForce 550 TI. I've had this for about 17 months now, and just recently I have been getting this weird problem. In all the games I play (WoW/RIFT) whenever I move my mouse, my fps drops CONSIDERABLY, no matter what the video settings are. Using just the keyboard, I have 0 lag, yet the second I move my mouse, my FPS goes to near zero. I've looked all over the internet, and I'm getting no solution. I'm not really savvy when it comes to computers, so explain as much as you can. Please help. (My mouse driver, and GPU drivers are up to date)