I also am having the same issue with the game freezing or crashing my pc all the time. Sometimes it happens in 10 minutes sometimes hours. There is no pattern to it. I have tried absolutely everything you can possibly do. First specs.
My system specs:
Windows 7 64-Bit
AMD 1090T Processor @4.4Ghz
Crossfire ASUS 5870V2
16Gb OCZ DDR3 Memory
ASUS Crosshair IV Formula Motherboard
2 1Tb Harddrives Raid 0
2 Intel X-25M SSD 80Gb Raid 0
Ultra X4 1200 Watt Power Supply
My CPU and Video Cards are liquid cooled and CPU temp reaches 38 celsius and the hottest viddeo card only reaches 55-56 while the other video card reaches 52 celsius. I know nothing is over heating either. Here is a list of everything I tried up to this point which all failed to work:
1)Re-installing game (Four times thus far).
2)Updated to latest 10.7 Catalyst Driver.
3)Tried rolling back to an earlier Catalyst Driver (Tried 10.6,10.5, and 10.4).
4)First I installed onto an SSD, I thought who knows maybe thats why. So I re-installed onto a normal 7200 RPM Harddrive.
5)Tried every compatibility mode, none made a difference.
6)Tried running as administrator.
7)StarCraft 2 Switcher - What ever that is but I tried playing the game by running the SCIISwitcher.exe. Just kept crashing as before.
8)All 3D settings in Catalyst I had set as custom, so set all the 3D settings to "Use Application Settings".
9)Lowered all Graphic Settings with in the game to low quality.
10)For the heck of it, I turned off my Anti-Virus protection.
11)I experienced all of these issues while my cpu was overclocked to 4.4Ghz and Video Cards at a modest 950 core and 1250 memory (My pc was 100% stable and never experienced any problems of any kind ever) but I thought I would set the cpu and video cards at default clock speeds. This did not make any difference either.
12)For the heck of it I turned two cores off on my Hexa core cpu so it functioned as a Quad core, I didn't think that would have made a difference.
13)Forgot to mention that I also disabled CrossFire thinking that may help, but it did not. I also removed a video card and that also failed to work.
14)I re-installed Windows 7 twice just to be 100% positive the operating wasn't corrupted somehow, but fresh installation was also a failure.
There are more things I did but I cannot think of them at the moment. But I absolutely did everything you can do.
Does Blizzard know that this is happening to everyone ? Do you have any suggestions to get Starcraft II working ?
What ever anyone says, this is definitely a problem within the game itself. I play numerous pc games all the time and my system is perfecto. Games like Battlefield Bad Company 2, Crysis, Metro 2033, Resident Evil 5, Dirt 2, Dawn of Discovery, Sins of a Solar Empire, Dolphin Emulator (Resident Evil 0, Resident Evil 1 Remake), and many more games. My pc is a natural with any other game. I only have experienced a game crashing my pc till StarCraft II. I think the game is great and love it but I also hate this game right now because for the sake of my life it takes me a day to progress through one mission on hard setting because of the constant crashing... : ( I hope Blizzard patches this issue up soon so I can play again. It obviously is some sort of graphics problem because of how it crashes. Maybe ATI will release a driver update that fixes it, I don't know but I do know other people with different 5870 cards can play the game fine. It is a really awkward and probably going to take time for Blizzard to solve this bizare but crappy mishap.