Spent an entire week with this crap. Hit the MSFS 2020 icon and it takes you to the MS Store and wants to Update Gaming Services. Gets to 90% and then one gets an error message. Forget any help from Xbox (the real culprit) or MS.Follow these instructions to a tee. There may be more than one or two more entries to delete from the Registry. If you are not computer savvy, let someone who is do it. Once done, restart and download Gaming Services and install. Good Luck, worked for me, have everything back to square one, but it took some time, be patient and read this carefully.
[FONT="]Anyone having this issue, after hours of frustration with this, finally have it working.[/FONT]
[FONT="]Do not, as you may be advised, reformat and clean install Windows as its not necessary, as are most of the possible solutions that I have seen in various posts.[/FONT]
[FONT="]The main issue with Gaming Services is keys in the registry including ghost service entries in the registry, there is a version mismatch, if you ever get this error no matter what you try as long as they are there it will never install, thereby rendering your Game Pass Ultimate experience virtually useless.[/FONT]
[FONT="]I first got this error "0x00000001", I then reset Gaming Services, that then caused another error "0x80073D26", that's when I found the services in task manager which were effectively ghost entries doing nothing.
Firstly I reset Gaming Services, then proceeded with the following:[/FONT]
[FONT="]1. Go to C:\Program Files\WindowsApps find 2 gaming services folders, take ownership and delete.[/FONT]
[FONT="]2. Open RegEdit as an administrator and delete the following:[/FONT]
[FONT="]Keys.[/FONT]
[FONT="][HKEY_USERS\.DEFAULT\Software\Classes\Local Settings\MrtCache\C:%5CProgram Files%5CWindowsApps%5CMicrosoft.GamingServices_2.45.11001.0_x64__8wekyb3d8bbwe%5Cresources.pri][/FONT]
[FONT="][HKEY_USERS\.DEFAULT\Software\Classes\Local Settings\MrtCache\C:%5CProgram Files%5CWindowsApps%5CMicrosoft.Gamingservices_2.45.11001.0_x64__8wekyb3d8bbwe%5Cresources.pri\1d6937194966bce][/FONT]
[FONT="]Services.[/FONT]
[FONT="][HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\GamingServices][/FONT]
[FONT="][HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\GamingServicesNet][/FONT]
[FONT="]The version numbers may be different depending on what you have installed. There may be more than two entries, delete them all.[/FONT]
[FONT="]3. Restart your PC.[/FONT]
[FONT="]4. Once restarted, open Microsoft Store find Gaming Services and install, it will now work.
Caz[/FONT]