Before I start I know for a fact this is not a hardware or PSU problem. My computer worked great until I installed combined operations from steam.
I ran the game for the first time an it caused my PC to shut down without warning after about one minute.
I googled the problem and found a user on these forums who said that since installing arma 2, not only would that game cause his of to shut down, but that all other games now caused the same issue. Wow. As a shot in the dark, I decided to eat this and sure enough the same thing Happened to me. Starcraft, the game I have played religiously until installing arma, now causes my of to shut down after approximately 5 minutes of gameplay.
All other games now do the same. The user claimed the problem was solved by uninstalling arma. I did this, but now I still experience this problem.
I am devistated that my computer that I have used for gaming up until today has become a brick because of arma 2. I want my money back and I want my computer back to the working state that it was in until I had the bright idea to give this game a try.
Does anyone have any idea what I might try aside from completely reformatting my pc? I will not attempt to run any kind of beta patch or attempt to "fix" arma in any way. I already consider this and any release by this developer to be untrusted software. I have already uninstalled have no intention of ever playing after what I have experienced today.