computer freezes up

I had been duelboxing for yrs no problem. i decided to go to tri-box and my computer freezes up and I have to manually restart. Any ideas? The set up is as follows: I copied and pasted my wow folder. I have three; wow, wow2, wow3. I run them all at once on same computer, same moniter. The computer is an 8 gig ram, amd phenom 9750 quad core 2.4 ghz 64 bit, with windows vista. I haven't even gotten a chance to load up keyclone the computer freezes at random while all 3 wow clients are up. I have a sneaking suspision it has something to do with the wow folders. Any help would be much appreciated, thanks in advance!

no addons running.

try re-downloading your graphic card.. I once had a problem where videos played frame by frame, and it was due to a needed update. But another time where this happened. the whole graphics card was broken.. If you personally installed this computer, are you sure you didnt bang it up against something.. or not clear the electric shock in your hands?

Also check to make sure that you do not have a virus, because sometimes thesy cause any type of program to freeze..

Other than that i really dont see why ur good computer should do this.

Could be heat. Have you tried taking the side cover and running it like that?

O yeah totally forgot about heat.. that is the most probable.. Because ur rig is like cooking butt, but without cooling it will shut down

i put my penny's on heat as well..
Had a similar problem when i was hardware boxing with my old office computers.. 8o
I had alot of dust though in 1 machine and it didt cool very well. after removing that i had no more freezes.