See my post below (you can elect not to have automatic updates).
My post
Acknowledged!
However, this certainly appears to be a late change of tactic - but even then, it appears to only be an option to opt-out of the "additional-Features" aspect, since it indicates that you won't be able to opt-out of the Security-Updates - hence, it DOESN'T appear to let you stop an outsider (albeit the intention that this is Microsoft) taking over your PC & updating the Operating System to its heart's content - allegedly in the name of Security!
Historically, that (IMHO) has been one of the bug-bears of Microsoft - it has always allowed "back-doors" to enable further development - just unfortunate that it is usually the "Hackers" that exploit these "further developments!