I don't really have anything running in the background except for maybe my web browser and half the time not even that. I don't do RPG Lp's or anything like that.
Do you have any mods installed?
Do you experience stability problems wihth anything else?
You can try aclean boot to windows and play the game then.
http://support.microsoft.com/kb/929135
Dont reenable anything and try to play .