Just got off the phone with Microsoft, tech apologized for not being able to confirm my earlier supposition here (He totally fooled me into thinking it was unrelated). Tech sent me to this article here.
I explained at colourful length my opinion of the superlative way Microsoft’s corporate communications staff handled this general patching window, which I’ve spoken about in my previous post.
Reading between the lines it seems as if Google jumped the gun, and now Microsoft (and presumably the rest of the world) are playing catchup.
What a fun start to 2018, eh!
Cheers, and good luck!
Update 03:10 UTC 04 JAN Microsoft have released KB4056892 to resolve this issue on Windows 10 machines however it looks like they may have had to rush it out as there are several known issues with it.