Sort of. The video card is crap; it’s an AMD, and my computer guy flatly refuses to work with AMD cards. Which is actually fine by me, but he also didn’t have a NVidia card of the right type (I’ve got a AMD Radeon R9 280 3GB Video Card (Require Min. 600W Power Supply) in there now) to swap it out with. But the basic problem that was causing the CPU to crash were the fans; dust/gunk buildup was causing the overheating and subsequent shutdown.
For right now, the box has been cleaned thoroughly of dust and it’s running considerably quieter. It does still runs loud in Fallout, but it’s no longer shutting down. The plan is for me to go buy a new video card* and have the guy install it; yes, I could do it myself after I watched a few YouTube videos, but I had to spend five minutes convincing the guy to charge me anything for looking it over in the first place. This is why we have money, right? To make it possible to have people who can specialize in stuff.
*I think that I should be looking at the GeForce GTX 960, or maybe the 1060; that’s roughly equivalent to what I have now, right?