After exhausting every other solution I could find for the Win 11 hangs (usually when running MS Flight Simulator), I decided to test the same app on the same computer but with Win 10. So using a dual boot, I put MSFS on it's own SSD and kept other apps to a minimum.
I'm sorry to report that shortly after doing that Win 10 started hanging a few minutes into MSFS also. Flight Sim Help, after analyzing the requested files, responded:
It's still the same thing. There are no errors generated when the app locks up which leads me to think the issue might be related to an OS error.
I built a very high-end system mostly for that sim. So it pains me to say that the more resources I give it, the more unstable Windows 10/11 seems to become. Pure speculation though, on my part - but my old, slow Win 10 computer did not have this problem.