That's really unfortunate. I'd hate to see a potential fan turned away due to technical issues. I'm probably preaching to the choir as I have no doubt you probably know what you're doing but two heads are better than one sometimes. First things I'd check is steam and reddit to see if anyone has found work arounds or make sure you've gotten the latest patches. Even their own forums may have info. Outside of that it's possible they optimized it for a different version of Windows. If you have eight maybe try a compatibility mode. Or run as administrator. Maybe tone down the graphics options either in game or in your cards software and if that works then slowly start cranking things back up until a culprit is found. Hopefully it's simple. Sorry you're having so much trouble. I know it's infuriating to buy something and not be able to enjoy it :/