I had a call with Dell Tech Support yesterday. Didn't get to call them today to follow up yet, I will tomorrow. But the jist is that after refreshing the operating system, the problem was NOT fixed, and my art computer is probably down now as a result. I have all my files backed up (except for a few save games, oh well), so I can attempt to do my work on this laptop (streaming and all!) but I am not going to be able to do a lot from my main machine.
Like before, the master machine is under warranty. It will probably need a new motherboard, since all of our software fixes didn't work. No telling how long that will take, or if it will require me to send the whole thing back, or whatever.