From your post, you have yet to follow the instructions posted in it.
If that does not work, try a clean bare bones install, you will need a spare hard drive. Disconnect your current drive and hook up the spare. Install your OS on the spare drive and nothing beside the required drivers to run the game and the game itself. Nothing else at all and see how it runs then. If it does not run, you likely have a hardware issue such as memory, cpu, etc.
UT.exe has encountered a problem and needs to close: A crash right at launch.
Status: OPEN (2 solutions available)
Solution: If using ATI hardware, ensure "Support DXT Texture Formats" in the Catalyst Control Centre is enabled (3D --> More Settings).
Solution: If using ATI hardware, in the utengine.ini set the following values:
Under [Engine.ISVHacks]
set: DisableATITextureFilterOptimizationChecks=False
set: bInitializeShadersOnDemand=True
set: PumpWindowMessagesWhenRenderThreadStalled=True
Under [SystemSettings]
set: OnlyStreamInTextures=True
Main Thread: http://utforums.epicgames.com/showth...ighlight=crash
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