Windows 11 Version 21h2 Build 22000.978 | 22h2 ... May 2026

Windows 11 Build was a major cumulative update for the original version of Windows 11 (21H2), released on September 13, 2022. It served as the final primary maintenance update before Microsoft launched the first major annual feature update, Version 22H2 , on September 20, 2022. Windows 11 Version 21H2 (Build 22000.978)

Included various security improvements and quality fixes for the Servicing Stack , ensuring a reliable update process. Windows 11 Version 21H2 Build 22000.978 | 22H2 ...

Addressed a critical issue where the web dialog for signing in or out of Microsoft accounts (MSA) failed to appear on some devices. Windows 11 Build was a major cumulative update