From http://www.sordum.org/9470/windows-update-blocker-v1-0/: “Windows Update Blocker is a freeware that helps you to completely disable or enable Automatic Updates on your Windows system , with just a click of the button .”
From https://betanews.com/2016/12/09/windows-update-blocker-disables-os-updates-on-demand/:
‘At first glance, the program doesn’t seem very interesting. Launch it, select “Enable” or “Disable” and click “Apply Now” to make the change. No surprises there.
But wait — there’s also a much less ordinary “Protect Service Settings” option which prevents Windows or other users reversing your settings.
We’re not quite sure how the process works — a little permissions tweakery, probably — but it’s certainly effective. We tried disabling Windows Update, then opened the Windows Update service and found there was no way to stop, start or change its startup type.’
This program is listed at major software sites softpedia.com and majorgeeks.com.
I haven’t tried this program, but I may in the future, perhaps in conjunction with Wushowhide or Windows Update MiniTool.