I just bought this on the PC on steam and the game will not run. Everytime I got to open it, it crashes and says the app is already running. It's not. I checked task manager. I know nobody from Activision will read this, but I was hoping someone here had a solution. I am using Windows Vista.
Got here about a month late but we are reading your post. May I suggest that you try updating your graphics card drivers and shutting down non-windows essential programs? Please take a look at our support article for more assistance.