Computer freezes when trying to play these games....

HiMy computer suddenly freezes when i try to play some games Company of Heroes and Starship Troopers.
It happens in CoH im trying to play, i can start the game go to the menu and all that but when the map is loaded and i am in game it freezes and the sound gets noisy and wierd, when i try to play starship troopers i get past the intro vids. but where it says Start Game the same thing happens.
I asked the same question in a Norwegian forum and thay told me it could be RAM issues or a weak PSU, i ran a RAM check and bought a new better PSU, the RAM is ok (i tried other RAM chips also) but the same thing happens.
I don%26#39;t think it has anything to do with that my computer cannot run the games becous it runs rainbow six vegas and C%26C3.Any suggestions and help would be verry apprichiated!
(sorry for my bad spelling)Here is a link to a DxDiag.txt file if thats to any help
http://tinmanweb.googlepages.com/DxDiag.txtComputer freezes when trying to play these games....
Maybe your processor is Over HeatingComputer freezes when trying to play these games....
i don%26#39;t think that is the problem, i cheked the heat and its about room temp.
Checked the RAM for errors?
yes, and there was none.
btw. when i use the tool from systemrequirements lab thay give me this message on the video card ''Video Card Driver Version (DirectX) - Your driver version number is: 6.14.10.6683 - FYI: Your video card driver version is provided for your information, but it is not part of this analysis. But proper video card driver versions are important to the proper operation of your product.'' and thay say that there is an update but i dont seem to find any with the link thay give. i also get this on my sound ''Sound Card Driver Version - Your driver version number is: 5.1.2535.0 - FYI: Your sound card driver version is provided for your information, but it is not part of this analysis. But proper sound card driver versions are important to the proper operation of your product. ''I just post this if its to any help.