Start menu does not open after Power Shell Command

[errorproxy]

So my mail app was not opening links. So I looked up how to reinstall the mail app. Got to this: http://www.howtogeek.com/224798/how-to-uninstall-window...

I uninstalled the apps, then ran the powershell command: Get-AppxPackage -AllUsers| Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”} to reinstall the mail app.

A bunch of red errors appeared in the prompt and now my start menu, notifications, onedrive,... won't work.

How do I restore these functions? sfc also does not work in Powershell but does work in CMD. Also, it does nothing.

 

[Trouble]

How do I restore these functions?

IDK. I think, if it was me, the first thing I would try is.....
Create a new local user as a member of the local administrators group (not a standard user) and log off from your account and log on to the new user account and see if the problems were global or unique to your user profile.