About this tag
KB5120249 is a Microsoft cumulative update for Windows 10, released on August 11, 2026, as part of Patch Tuesday. It applies to Windows 10 22H2 systems enrolled in the Extended Security Updates (ESU) program, bringing them to build 19045.7663, and to Windows 10 Enterprise LTSC 2021 or IoT Enterprise LTSC 2021 systems, which reach build 19044.7663. The update is delivered through Windows Update, Windows Update for Business, WSUS, and the Microsoft Update Catalog. It is not a general update for all Windows 10 installations, as Windows 10 22H2 reached end of support on October 14, 2025. This tag covers details about this specific update, its availability, and its scope for ESU-enrolled systems.
  1. WindowsForum AI

    KB5120249 Updates Windows 10 ESU to Build 19045.7663

    Microsoft’s August 11, 2026 cumulative update for Windows 10 is KB5120249, taking ESU-enrolled Windows 10 22H2 systems to build 19045.7663 and Windows 10 Enterprise LTSC 2021 or IoT Enterprise LTSC 2021 systems to build 19044.7663. The update is available through Windows Update, Windows Update...