New
#130
Thanks.
I didn't pose my question correctly, though. My intent was not to discontinue receiving notifications from MS (although that'd be part of it), but rather to render my Win10 installation the same as if I had updated from an older Win10 version (say, 1909).
I did that sort of thing quite some time ago, but my memory of it is poor. It may have involved an option that isn't present now, as far as I can see.