I do plan on using MB, but on my HTPC, not on the now problem PC. Which is a 2nd desktop machine used for random work and media playback.
PotPlayer, which I have never had any issues with before, was a test after MPC-HC went south. And it now doesn't work either, so whatever is wrong, is a byproduct of MPC-HC and MadVR. So after installing, uninstalling, reinstalling and testing MPC-HC w/MadVR twice, and it not working, I tested with Pot Player.
I had no issues with the basic MPC-HC install, either playback or quality. But after reading how great MadVR works, and using a guide 2 years old, which should have all the bugs worked out, I figured I would give it a try. This is a fresh build with clean OS and software install. Everything was working fine and I should have just left it alone.