First, export the certificate from the MSIX (or obtain it from the publisher). Then add it to the store:
MSIX is the modern Windows application packaging format that combines the best features of MSI, AppX, and ClickOnce. While double-clicking an .msix or .msixbundle file works for interactive installations, PowerShell provides a more powerful, scriptable, and automated approach—essential for IT pros, developers, and enterprise deployments. install msix powershell
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: First, export the certificate from the MSIX (or
$CertPath = "C:\Certs\MyCompany.cer" $Cert = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2($CertPath) $Store = New-Object System.Security.Cryptography.X509Certificates.X509Store( "Root", "LocalMachine" ) $Store.Open("ReadWrite") $Store.Add($Cert) $Store.Close() Add-AppxPackage -Path "C:\Downloads\MyApp.msix" -AllUsers Security Warning: Only trust certificates from legitimate sources. Installing from a URL (Download + Install) You can download and install an MSIX in a single script without saving the file permanently: Add-AppxPackage -Path "C:\Downloads\MyApp
Add-AppxPackage -Path "C:\Downloads\MyApp.msix" -ErrorAction SilentlyContinue For fully unattended scripts, combine with -ForceApplicationShutdown to close running instances of the app:
Get-AppxPackage -Name "MyCompany.MyApp" | Remove-AppxPackage For machine-wide installations (requires admin):