I have Windows 7 64 bit and graphic card from NVIDIA. I had CTD every time after a few minutes of playing, and any suggestions i was found here didn't help. But I probably solved this problem for me. In application's properties (right-click on shortcut) in the "Compatibility" I was pointed "Disable visual themes" and "Disable desktop composition". Of course, compatibility with Windows XP SP3 and run as administrator. After that I played twice time about an hour without any crash. All graphics options in the game settings in full. Maybe this will help someone too. My system is in Polish so option's name in English may sound different, below is a screen which options pointed. Sorry for my english.
