When you start Wusa.exe in interactive mode, a welcome screen displays high-level information about the update. If you continue to install the update, Wusa.exe calls the appropriate function in the Windows Update Agent API to start the Windows Update wizard.

If you can’t install, uninstall, or update a desktop program in Windows 10, the Program Install and Uninstall troubleshooter can automatically fix common issues such as corrupted registry keys or incomplete uninstall data.

The installation file is typically named Autorun.exe or Setup.exe, but this may vary. If you're not sure, check the Readme file in the folder for instructions about how to run the installation process.

Use this tool if your device hasn’t received a feature update automatically through Windows Update. Download the Windows Update Assistant. What does Windows Update Assistant do? When to use the Windows Update Assistant? Use the Windows Update Assistant if:

Windows Installer provides a standard foundation for installing and uninstalling software. Software manufacturers can create the setup of their products to use Windows Installer to help make software installation, maintenance, and uninstallation straightforward and easy.

Download and install any available updates in Windows Update, including software updates, hardware updates, and some third-party drivers. Use the Windows Update Troubleshooter to fix Windows 11 Update errors. Check third-party drivers and download any updates.

Learn how to check for the latest Windows Updates and install them to keep your device running smoothly and securely.

Learn how to reinstall Windows using Windows Update.

Windows Update is an essential component of Windows 11, ensuring your system remains secure, stable, and up-to-date with the latest features. However, issues can occasionally arise, preventing updates from installing. This guide provides detailed steps to troubleshoot and resolve Windows Update problems effectively.

Learn how to create installation media for installing or reinstalling Windows.