Thanks for sharing. It seems that this solved the issue for many users.
However, even when I run the command shell in admin mode I get following error message:
"Get-AppxPackage' is not recognized as an internal or external command,
operable program or batch file."
Does anyone have the same issue? What should I do in this case?
Update:
I got it. This needs to be done in PowerShell not command shell - these are different apps.
Now it works for me!
Thanks