I’m nowhere near as qualified as you on computers. Just some guy that likes flight simulator and dabbles in computers. There are at least a few thousand of us that play daily without problems, so the problem has to be somewhere in your system or your network. Keep looking. MSFS will find any weak spot in your system. Best wishes. Run every diagnostic you can think of. My last problem was bad ram after four years of use. I hope it works out for you.