So a person i know got this game, installed it, ran fine for like 30 minutes to an hour. Then the window instantly closed. He couldn't get it running again, having issues with the computer not recognizing the disc. He put in another disc, it ran fine, so didn't know what to do. He did a can you run it, and he met minimum requirements, checked is dxdiag, no problems. His video card is Nvidia Geforce 8300 or something similar, but it met minimum requirements, anyone have any idea whats going on?