Describes the new and improved features of Microsoft Windows Installer 4.5. The article also discusses the issues that are addressed from earlier versions of Windows Installer.

This article describes the Windows Update Standalone Installer (Wusa.exe) in supported versions of Windows operating systems. The Wusa.exe file is in the %windir%\System32 folder.

The Windows Update Assistant downloads and installs feature updates on your device. Feature updates offer new functionality and help keep your systems secure. You’ll get these updates automatically after you download the Update Assistant.

Describes how to troubleshoot problems that occur when you install, uninstall, or upgrade a program on a Windows-based computer by using Windows Installer.

Using this tool will reinstall the current version of Windows on your device. This tool preserves all your apps, documents, and settings. Make sure to keep your PC connected to a power source and the internet during reinstallation. The reinstall will take you to the Windows Update page in Settings.

This article discusses how an administrator can integrate Windows software updates (for example, security updates, critical updates, or hotfixes) that use Update.exe into their Windows installation source files.

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

Discusses the user rights that you must have to install a product update for version 5.4.1.0 and later versions of Update.exe. Examples of product updates may include security updates, critical updates, update rollups, or hotfixes.

In the Windows Update window, select either important updates are available or optional updates are available. The system will automatically check if there's any update that need to be installed, and display the updates that can be installed onto your computer.

The enablement package is a great option for installing a scoped feature update like Windows 11, version 23H2 as it enables an update from version 22H2 to version 23H2 with a single restart, reducing update downtime. This enables devices to take advantage of new features now.