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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
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:
(Get-AppxPackage Microsoft.DesktopAppInstaller).Version
Training
Module
Explore the Windows Package Manager tool - Training
Streamline the installation and maintenance of software on your computer by using Windows Package Manager. Explain the front-end components and commands, the Windows Package Manager repository, and how to contribute to the repository.
Documentation
Install Windows 10 apps with App Installer - MSIX
This section contains or links to articles about App Installer and how to use the features of App Installer.
App Installer Security Features - MSIX
This article provides information on the security features provided by the App Installer.
Using an embedded AppInstaller file to update your app - MSIX
This article describes how to embed a pre-existing AppInstaller file into your Windows application