The App Installer ships as part of Windows. It allows for easy installation of MSIX files and MSIXBundles.

If updates are enabled on a PC, then the App Installer will be updated automatically from the Microsoft Store. If the App Installer doesn't update, then you can use the troubleshooting tips at Fix problems with apps from the Microsoft Store.

If your PC doesn't have access to the Microsoft Store, then use the download button below

Download the installer for the latest version of App Installer

Winget can update App Installer for you. At the command prompt, just type winget upgrade Microsoft.AppInstaller.

You can use this PowerShell command to determine the version of App Installer that you have installed: