Frame rate issue

So, I have had some serious issues when it comes to running my Valve and some of my Steam games. The issue is whenever I move my mouse the frames drop from whatever they are (vary depending on the game) to around 5-10. I have looked around and had an idea thrown at me about removing everything off my harddrive and restarting again (that is the last thing i want to do). If this is any help my mouse is a Razer Deathadder 3.5g optical mouse. 

Thanks for any help that you may have it is much Appreciated


try a driver reinstall