I have upgraded to the Windows 11 Preview through the beta program. Trying to start Windows Defender yields in an error message:

Googling the issue, there is supposed to be a fix for Windows 10 by running:

Add-AppxPackage -Register -DisableDevelopmentMode "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml"

from an admin power shell.

In Windows 11 preview I get an error though:

Add-AppxPackage : Cannot find path
'C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml' because it does not exist.
At line:1 char:1
+ Add-AppxPackage -Register -DisableDevelopmentMode "C:\Windows\SystemA ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : ObjectNotFound: (C:\Windows\Syst...ppXManifest.xml:String) [Add-AppxPackage], ItemNotFou ndException + FullyQualifiedErrorId : PathNotFound,Microsoft.Windows.Appx.PackageManager.Commands.AddAppxPackageCommand

0

1 Answer

Open an admin powershell and run:

Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage

Source

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