As I had the issue frequently in the early days and not since a year at least - without knowing why it did improve - I saved the following description of a solution that worked everytime for me:
- Open your Registry Editor
- go to the HKEY_LOCAL_MACHINE section,
- then to SYSTEM
- then to Current Control Set
- then to Services.
In that bit you will find two things - Gaming Services and Gaming Services.Net - delete both of those two things completely and then restart your pooter. Reinstall Gaming Services from MS Store. Sorted.
Alternative if you are reluctant to meddle with the registry:
- In the Windows search bar, type Windows PowerShell
- In the menu, select “Run as administrator.”
- In the Administrator: Windows PowerShell screen, type the following command and press Enter:
get-appxpackage Microsoft.GamingServices | remove-AppxPackage -allusers
I was then able to reinstall Gaming Services from MS Store.
(copied this as part of the procedure as well but never had to use it as the above already did the trick, but anyway:)
In the same window, type the following command and press Enter:
start ms-windows-store://pdp/?productid=9MWPM2CQNLHN
Click Get to install Gaming Services (select Yes if you receive the User Account Control (UAC) prompt)
Restart your device, and try to install or update Microsoft Flight Simulator again.