nvidia rears its head again. Supposed to be one of the best graphics cards around but so many people have trouble with it. First you need to go to the nvidia website and download the very latest drivers for your card, you may have to remove the old drivers first and there is a utility to do this (do a google search) then you should check the specifications of you pc against the minimum required by the games. I would strongly advise that when ever you load any new software you only load one thing at a time and reboot after loading. That way if you get a problem it is easier to trace and solve. Hope that helps.