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WuMgr (Update Manager for Windows) is a tool to manage updates of Microsoft products on the Windows operating system. It uses the "Windows Update Agent API" to identify as well as download and install missing updates. It allows the user fine control of updates on modern (Windows 10) operating system versions, comparable to what windows 7 and 8.1 offered.

This tool is inspired by the Windows Update Mini Tool (WUMT), however in comparison to WUMT it is written in pure .NET instead of C/C++, and it is open source. The first thing that new users need to do is click on the search button to run a scan for available updates. The program displays all available updates in the main window. Each update is listed in a specific category, e.g Windows Defender or Drivers, and information such as its name, Knowledgebase ID, release date, or size are displayed. The options listing in the sidebar display a handful of interesting preferences. There it is possible to change the update source -- the default is Windows Update -- and change the program in other meaningful ways, e.g. to include superseded updates in the scan or enable offline mode.

The automatic update check has been improved, and the date format should now display properly in all regions.

The general feel and functionality of the application has not changed in the new release. The program requires elevation to run and may still be started without installation. It uses the Windows Update Agent API for update management functionality and loads the update history on start.