Try going into the bios and look at the memory settings---your looking for something like "slow, normal or fast" or "70, 60, auto." What you want to do, is set your memory to a slower refresh rate.
This freezing can be caused by a memory mix --two different vendors memory installed, overclocking, or just memory forced to run too fast.
If you go to the games web site, there are usually patches for all sorts of problems. Games push the envelope. Thats what your computer is telling you when it freezes.
Hope this helps