System was working fine with Beta 10. Then I decided to upgrade my system. After upgrading MB/CPU/Mem but kept drives etc, MSFS splash screen appears, says its syncing data, launching game, black screen then back to the desktop? Went into the UEFI and opted for system default settings, same same! …

I do believe I have found the culprit now thanks to MichaMMA and Hester40MT. An old copy of Project Lasso I haven’t used in over a year was loading in the background!