When I first installed the game, I had no antivirus or anything running.
I can play through the prologue level just fine, then while loading level 1, the game freezes. When I open task manager to close the game, I see that there is already a dialog box informing that the game has suffered an "App Crash". I doubt it could be the install, and I have slow internet so I'm not willing to re-download unless that truly is the only way, as others have said. Any suggestions would be welcome!