The affinity option is under the Details tab in Windows 8's task manager. Otherwise, it works the same as in Windows 7. Right-click on the .exe and select "set affinity."
As for your video card, it's dual-GPU, so you'll want to set the game to run on a single GPU in your Nvidia control panel under "3D Options". Otherwise, I'm not sure why it's giving you an error when it tries to detect your video card.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."