Bluescreen before game will start

[Bluescreen before game will start]

HI ,

i've installed the game ,wanted to start , but everytime when i start the game ,it crashes with a blue screen and my pc reboots.

in reason of that i reinstalled my whole system ,that means only Windows, the newest drivers , updates and directx. But the same Problem !

Sure ive renamed the .exe and compatibility and administrator.

I am very dissapointed ,because i was so happy to hear about Arma 2.

can anyone help me pls ?

i am trying now for 2 days

when i cant solve the problem , i will bring it back to store tomorrow.

thanks

My System :

Vista Home Premium x64

Ati HD4870X2

Q9550 Intel Quad Core