Windows 11 21H2 (2021)
Windows 11 21H2 (2021)
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Final Updates & Lifecycle Milestones for 21H2
October 8, 2024: Final security update (KB5044280) released for Enterprise, Education, and IoT Enterprise editions, marking their official end of servicing.
June 11, 2024: Critical fix for the "Secure Boot" certificate issue, ensuring that legacy 21H2 installations could still boot properly after June 2024.
October 10, 2023: Official End of Support for Home, Pro, and Pro Education editions of Windows 11 21H2.
January 2023: Microsoft began automatic forced updates for unmanaged 21H2 devices, moving them to version 22H2 to ensure continued protection.
October 4, 2021: The General Availability release of Windows 11 version 21H2, launching the modern era of the Windows NT operating system.