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#11
I have Home and have looked at this question in detail.
First, make sure you haven't accidentally ticked the option that first appeared in 1709 to '...automatically download updates over metered data connections'.
https://www.tenforums.com/tutorials/...ml#post1184354By default, Windows Update in Windows 10 will automatically download and install updates, except on metered connections (where charges may apply)...
This tutorial will show you how to enable or disable Windows Update to automatically download updates over metered data connections in Windows 10.
Second, note that starting with 1703 there was a subtle change in the wording regarding metered connections. It now says...
Observation has shown that those updates deemed too urgent to wait for an unmetered connection include the Flash updates, but do not include the cumulative updates, as demonstrated in this screenshot. Note that the CU is awaiting you clicking Download, while the Flash update has already downloaded.
Subsequently I've only seen one other type of update download over a metered connection, updates for the Defender Antimalware Platform. That's an update for the Defender engine and UI itself, definitions updates do not download automatically on a metered connection.