Why would anyone install a 3rd party replacement for core OS functionality?
Like, duh. Protecting the core of the system against attack is the responsibility of the OS vendor. After some delay Microsoft now does this (unlike certain fruity people, and Linus).
I had a Surface Pro4, it updated fine (this machine; my serious compute machine, still hasn't volunteered me). The SP died some weeks afterward because, I believe, of a failed fan; it's out for $450 support (replacement). Nothing to do with W10, something to do with MS's mistake of putting moving parts in the "high" end machines.
The probably permanent Cortex(?) "SP" replacement (Microsoft no longer do numbers, watch out Linus; no numbers are even cheaper) upgraded itself today while I was setting it up. I had to kill it during one of the "don't turn me off or I will die" moments, but then that is to be expected with a modern OS; if it can't survive that what good is it?
Bottom line, as we say over here, don't throw gasoline (petrol) over someone else and blame them for catching fire.