Yes. Done it.
I think the problem has something to do with the Digital Ownership.
I bought the Premium Deluxe Version of Flight Simulator. When I try to install the Digital Ownership, Msstore tries to install the base version of the game. It gives the 0x800FFFF error
If I stop the installation then and in Xbox ask to install the Premium Deluxe Version I own (the base costs 69 euros), there is no download and the other error pops up.
I am definitely going crazy
According to MS, the error code is a Windows Update error.
MSFS needs Windows to be updated to work properly.
The error code 0x8000ffff means your Windows 10 is having update issues . This error usually appears after Windows updates and locks the Windows Store. Besides, it can crop up after your performing the system restore or when you try to install a newly downloaded app.
in that case try to check for updates and restart your pc. If that does not help, maybe look at this?
How To FIX XBOX App Error Code 0x00000001 In Windows 10 Can't Download or Install Xbox App Games - YouTube .
Had a chat some days ago with Microsoft Support. They had problems too in installing Flight Simulator 2020 on my computer. They even tried in remote but with no luck.
However, for those interested with this issue, please notice that changing the unit where the game was once installed can cause a corruption in the installation manager.
The only way to solve is formatting the computer and do a clean installation of Windows, choose the unit where Windows is installed and voila, the game is installed!
Thanks for the replies! Happy flying
The only way to make it work again is to perform a full clean installation of Windows and install the game in the same unit of the OS.
After installing windows, open Msstore and do the updates, install Xbox App and voil, Msfs starts to download