So i dont know really how to explain this but i did re-install windows 7 and since that my pc has been getting terrible lag when i move my mouse.. for example when i put a youtube video on and move my mouse at all it just lags, not just vids or games my whole pc lags.. does anyone know a fix i have tried lots of things did look on google but nothing works for me, i just wanna play renx and other games and have fun again, please let me know