BSOD problem with my new pc HEELP

Got my new PC few days ago,
Windows 7 Home Premium 64 bit
its all fine when im in the lobby, or in the room. the only problem is that when i try to join a game, when the loading page shows up, my computer got blue screen, every single times i tried, its the same result...
this pc runs fine with other games, like medal of honor or LOL or dragonage, only have problem with crossfire,, hope someone can help me :(

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