AppReadiness Service and Black Screen

Okay, as close as I can get to a solution. The other attempts helped but this is the solution so far...

In the event viewer under administrative events you will see ERROR relating to either App Readiness or App-Model Runtime both pointing to something like... "8wekyb3d8bbwe" saying that is corrupt or install failed.

You will also see the profile it is attempting to apply it too such as...

S-1-5-21-527237240-2025429265-725345543-1124

Go to the following key and confirm the name of the user with the issue, to be fair its probably all users.

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-21-527237240-2025429265-725345543-1124

Next, go to the following key

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Appx\AppxAllUserStore

You will see entries relating to the above... "8wekyb3d8bbwe" make a backup and then delete all entries

Next, go to the following key

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Appx\AppxAllUserStore\S-1-5-21-527237240-2025429265-725345543-1124 make a backup and delete the entry or all users if effecting everyone

You can then login and you will be on your desktop in around 10 seconds, I cant get it lower than 10 seconds at present. Everything continues to work as expected without any issues.

I have applied the above to a few machines now and it is the only thing that works at present!