Download a program called Razer Game Booster, this shuts down background stuff on your PC that slows down your games and doesn't need to be running while you're gaming. That's really helped me run Fallout 3, New Vegas and Skryim really well. Hell I can barely run Skyrim on the lowest settings without it, but with it I can run it just fine on medium settings.
I am a dedicated member of the "Walter Sullivan Is Bad-Ass" group!!! I am the true originator of the Cookie Demon theory on the SH2 and 3 boards.