KB5031539: Servicing stack update for Windows 10, version 21H2 and 22H2 ...
KB5031539: Servicing stack update for Windows 10, version 21H2 and 22H2: October 10, 2023 - Microsoft Support. Windows 10 Home and Pro, version 21H2 More... REMINDER. Windows 10, version 2004 reached the end of servicing (EOS) on December 14, 2021 for all editions. For more information, see here.