The game window doesn't get focus unless I manually tell it to. It starts as a window behind all windows, think of it as taking over my desktop wallpaper and you have an idea.
Let's say I have the Steam window open, and press "Play". The game starts behind the Steam window and even behind my start menu. I can actually see it through my aero start menu, and sometimes the intro videos will even play with sound and everything. But as soon as I focus the window via any means, the video stops, the sword mouse icon appears for a few seconds, then turns into 7's "wait" mouse icon, followed shortly by a "This program is not responding, end now?" type of prompt.
Yesterday when I was testing it, it stayed at the splash screen and never started videos. The day before I was able to play a little bit after about 10 experiences of what was typed out above.
What is most puzzling is the lack of a crash. Come to think of it I will disable TeamViewer and other such programs when I get home. It usually just forces games into a windowed mode if it effects them at all, and this game may be struggling with that since it's in a full screen window.