Windows 10 version 1809 Home and Pro hit “End of Service” on Nov. 10. But users on version 1809 have been reporting for more than a month that they’re getting pushed onto Win10 version 2004.
This is a hard push – there’s no “Download and install” invitation (see screenshot below). You wake up one morning, your version 1809 machine takes forever to get started, and surprise! it wakes up running Win10 version 2004.