Don't forget to also disable auto-updates in Chrome/Firefox, since they are enabled by default.
Forgetting certain settings is annoying. Forgetting that I want to manually control when my computer downloads gigs of data to apply a patch that- in recent times especially- may very well brick my system... well, I can certainly understand where OP's frustration comes in.
Even at one of my jobs a few years back (which was about 50/45/5 apple / windows / linux shop) we were cautioned against applying major updates from apple within the first month or so of their releases given past issues.
But I do get your point, and Windows is indeed lacking an option to fully disable updates, even if it does have an option to defer major updates by up to an year.
Some rare times, some of us need finer grained control over these things, though, and it probably shouldn't be called "disable" if the OS will re-enable it at will, without notification.
It's one thing to protect the user from themselves, and another thing altogether to lie to them. It's (generally) the latter that will get people upset.
Con: they ask
Still, “how about tonight?” Is preferable to “right now, conference call be damned “