Add-AppxPackage -Path "C:\Downloads\MyApp.msix" -ForceApplicationShutdown If you receive an error like "The root certificate of the signature is not trusted" , you must install the signing certificate before installing the MSIX.
Add-AppxPackage -Path "C:\Downloads\MyApp.msixbundle" PowerShell automatically selects the correct version for the current system. To install an MSIX package for every user on the machine, you must run PowerShell as Administrator and use the -AllUsers switch: install msix powershell
First, export the certificate from the MSIX (or obtain it from the publisher). Then add it to the store: Add-AppxPackage -Path "C:\Downloads\MyApp
Add-AppxPackage -Path "C:\Downloads\MyApp.msix" -AllUsers Machine-wide installation requires a trusted, signed MSIX package. The certificate must be installed in the Local Machine’s trusted store beforehand. Silent Installation (No UI) MSIX installs silently by default when using Add-AppxPackage . However, you can suppress any PowerShell output or errors: Then add it to the store: Add-AppxPackage -Path
Get-AppxPackage -Name "MyCompany.MyApp" | Remove-AppxPackage For machine-wide installations (requires admin):
Add-AppxPackage -Path "C:\Downloads\MyApp.msix" -ErrorAction SilentlyContinue For fully unattended scripts, combine with -ForceApplicationShutdown to close running instances of the app:
$Url = "https://example.com/apps/MyApp.msix" $TempFile = Join-Path $env:TEMP "temp_install.msix" Invoke-WebRequest -Uri $Url -OutFile $TempFile Add-AppxPackage -Path $TempFile Remove-Item $TempFile -Force To confirm the package installed correctly: