Wow, way the go AMD. Way to keep up your reputation for having shitty drivers.
The problem affects a very slim percent of users. If you are running the card as a dedicated opencl accelerator, chances are you aren't the type of guy to hang out on Youtube all day. On a dedicated mining rig, no other app should be running that triggers the bug.
Besides, nVidia drivers aren't any better either. Remember the nforce chipset?
clonedone: run through the windows services, see if there's anything suspicious there (such as Windows Media Center). Also check if there are any scheduled tasks. I run a 6950 and any time it hangs, it's from an application I know I opened, never from something that opened in the background.
i just reformatted the whole system, installed the 11.4 cata, installed guiminer, and started it. it mined for 20 mins, then did the same wierd shutdown, where it dosent fully shut down, but nothing is running except the fans(as far as i can tell). then i restarted it and tried it again, it ran for an hour and shut off. now im trying it again, i never run any other programs or anything else, i updates windows though to service pack 1 for windows 7, but that was after i reformatted, doubt it has anything to do with it.
media center isnt running im sure of it. any other suggestion?