Don't have DX11 on my system, so I don't know how it could run that way. I get the message The application was unable to start correctly (0xc000005). Click OK to close the application. I dried uninstalling and reinstalling twice. It's a legit copy of the game, I even bought it thru steam. Dunno what the deal is.
Googled your error and found this thread:
http://forums.eidosgames.com/showthread.php?t=95675
I'm not sure if the guy ever fixed it, but there are a few suggestions:
1) Update your sound driver. Or, you can go into your device manager, and simply disable your sound card before starting the game. See if that works.
2) Run a malware/virus scan. I suggest using Malwarebytes. Run the scan in safe mode to be sure.
3) Run Memtest86+ to check if you have bad memory in your system. Run it for at least a few hours.
Did you do a "Verify Integrity of Game Cache" check through Steam, like I said?