Issues on my W11 23H2 machine with broken msix package feature. Credit to this post: https://answers.microsoft.com/en-us/windows/forum/all/solved-when-i-try-to-open-any-appx-or-appinstaller/cf339756-1dfb-453f-bbf8-52fbbecffdc5 Open a PowerShell Terminal (Admin) and enter: taskkill /im AppInstaller.exe /f This is just in case the process is hung up, so an error like "ERROR: The process "AppInstaller.exe" not found." is okay. Next, this command in the same PowerShell Terminal: Start-Process "shell:Local AppData\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe" A window will open. To be extra safe, copy the contents of this folder to an empty directory elsewhere, such as C:\Backup\ and then delete all the files and folders inside of the Microsoft.DesktopAppInstaller_8wekyb3d8bbwe folder. Finally we will reinstall the App Installer app with this command: Get-AppxPackage -allusers Microsoft.DesktopAppInstaller | Foreach {Add-AppxPackage -DisableDevelopm...
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