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After installing the game, pressing 'launch game' does literally nothing. pressing the short cut asks me if if i want to allow changes to my lap top to occur,but pressing yes, again, does literally nothing. like, at all. payed money for this game and it does not start up. any idea why? this is my first game download

What is your operating system ? Windows Seven or anything ? Did you try the compatibility mode ? Can you check the screen resolution is 1024*768 to keep sure this wouldn't be a conflict problem between the game and the desktop ?