Microsoft: Windows 10 1809 and 1909 have reached end of service

Multiple editions of Windows 10 versions 1803, 1809, and 1909 have reached their End of Service (EOS) on this month's Patch Tuesday, as Microsoft reminded customers yesterday.

How to Upgrade Windows 10 EOL versions? - ManageEngine Patch Manager Plus

What we know about the Win10 version 1909 upgrade — and what you can do about it

How to deploy monthly Windows updates

Windows 10 Help Forums

How to upgrade to Windows 10 version 1909, November 2019 Update - Pureinfotech

Update Windows 10 1809 to Windows 10 1909 using SCCM

Windows 10, Microsoft Wiki

Understanding The Windows-as-a-Service Timeline (As of September 2021)

How to Upgrade Windows 10 EOL versions? - ManageEngine Patch Manager Plus