Win10 KB4523786 – Uninstall It

Cumulative update for Autopilot in Windows 10 version 1903: October 22, 2019 was erroneously offered to all 1903 PC’s.
The folks over at AskWoody have been all over this:
First “The Patch Lady” wondered, “On a standalone PC that’s never seen Windows autopilot I am getting KB4523786 pushed out if I click on check for updates. And I have never installed autopilot here. (proving once again NEVER ever click on check for updates).”
Speculation and answers came in the comments on that post.
The following day a Microsoft Employee posted this: “A Windows Autopilot update, which was targeted as part of the out of box experience for new devices, was incorrectly offered to customers running Windows Home edition during regular scheduled Windows update scan. Once we became aware of the issue, we stopped distribution of the update. No action is required on your part.”
That is bullsquat. If you’re on 1903 and you checked for updates on Patch Tuesday then Microsoft installed or altered 90-ish files on your PC. Uninstall it.
Control Panel > Add Remove Programs > View Installed Updates > find KB4523786 and double-click it.
or you can run this from an Admin Command Prompt:
wusa.exe /kb:4523786 /uninstall /quiet /norestart
See: Microsoft pushes, then yanks, rogue kinda-security patch KB 4523786, ostensibly for Autopilot