My Problem:
i bought Ut3 on Steam. If i start the game it freeze in the first loading screen. My Cpu running exactly with 50% and 226 mb of the ram. If i wait nothing happens, i have to kill the task over taskmanager.

I allready installed the newest version of Directx 9 and Graphic Card Driver.

My OS is Win 7 Build 7100 x86 64bit version.

My Computer:
Asus P5Q Deluxe
Intel Q9450
Saphhire Hd 4870

I hope you can help me.