https://wccftech.com/microsoft-force-updating-windows-10-1809/

It’s that time of the year again… Apparently, just a day before Christmas, Microsoft pushed out an update that would begin installing the latest Windows 10 October 2018 Update on all the compatible machines. Going away from the seeker approach, the latest Windows 10 version (v1809) will now begin downloading on your PC without you clicking on the “check for updates” button.

Microsoft updated the infamous KB4023814 article, which is where the forced updates nightmare comes from. “If you’re currently running Windows 10 version 1507, version 1511, version 1607, version 1703 or version 1709, your computer detects the Windows 10 Update Assistant automatically,” the updated KB article says (via AW). “Then, you can expect to receive a notification that states that your device must have the latest security updates installed and then initiates an attempt to update your device.”