: Most editions of Windows 11 version 21H2 (including Home and Pro) reached their end of servicing on October 10, 2023 .
: If you are on Windows 10, you can often upgrade to the latest version of Windows 11 for free through Windows Update. Windows 11, version 21H2 known issues and notifications : Most editions of Windows 11 version 21H2
: Devices running this version no longer receive critical security updates, leaving them vulnerable to new threats discovered after its lifecycle ended. Safer Alternatives : Most editions of Windows 11 version 21H2