As stated, your comment gave me the clue, as for my installation of XP10, I used administrator rights and never experienced any issues to date. To correct go to main X-Plane folder to make the change. X-Plane.exe Right click X-Plane.exe to pull up properties Click Security then change settings under "Group or user names" to "SYSTEM"  which will remove special permissions  "administrator rights" option (which were applied previous installation) Simply click "Apply"  then click