A few things you can do to test the issue:
1. Disable Anti-aliasing in your options menu.
2. If that doesn't fix it load the game with the command prompt /nomultisample
Please let us know if the first, 2nd or neither option fixes it. It seems like your video card doesnt support anti-aliasing. The game is supposed to detect cards that cant do that, but the /nomultisample forces it to occur. So if that fixes it we need to know what card you have so we can get it blocked.
Thank you for your help and I apologize for your inconvienance.