Community folders in MSFS 2024 where you place your 3rd party add-ons. You have to read the instructions how to make a copy to preserve your MSFS settings and 3rd party stuff.
https://forums.flightsimulator.com/t/read-first-welcome-to-the-sim-update-4-beta/591232
It is not your PC it is either the settings or if in SU3 might still be the issues mentioned earlier. That is why I suggest trying the Beta SU4.
If you want to join there are clear instructions on how to do this somewhere in the official MSFS parts of this forum. I don’t do it as I am not the best at PC’s.