I am a former applications programmer, so not an operating systems person. However, I had figured out how to turn off the Windows 10 Home updates and would turn them back on periodically when I had the time to deal with fallout from them. This was reinforced by tremendous problems when the April 2018 updates were installed — it took me until January 2019 to resolve them completely. Recently, it seems that my methods aren’t working as well as before — at least two updates have slipped through with the latest being 2019-03 Cumulative Update for Windows 10 Version 1809 for x64-based Systems (KB4489899).
Currently, I have Windows Update in Component Services switched to “Disabled” — although when I checked on it after that last update, somehow it had been switched to Manual and was running.
I also have deleted tasks associated with Automatic App Update, Reboot, ScanForUpdates Scheduled Start with Network, Scheduled Start, and UpdateAssistant in the Task Scheduler.
What am I missing, such that I’ve gotten two updates lately?