I have a coupon for Dirt 2 from my purchase of an ATI 5850 video card. However, today, after downloading and installing the game, when I try to run the game, the system pauses for a moment and then nothing happens. I have also registered with Games for Windows - Live in case that makes a difference. When I attempt to run the game from its steam folder, I click on either dirt2.exe or dirt2_game.exe, and an Application error comes up, stating "The application was unable to start correctly (0xc0000005). Click OK to close the application." I have also validated the local files for Dirt 2 multiple times, and it says everything was validated. I have also restarted my computer several times, and updated my steam client registry. I am running windows 7 Professional 64-bit. Is there a problem due to my windows/DX version? I am not sure if DX11 is out yet, although this game is supposedly run off of it, this subject is somewhat unclear to me. Anybody else with these issues or knowledge on how to fix it? Thanks!