I do have a bootable windows 10 installation media (made today using Windows MCT). Have you had a chance to review my two posts on the Apple stack exchange? They comprehensively explain my situation and include multiple screenshots? I'm not sure if the problem is macOS side or Windows 10 side.
At any rate I cannot presently boot into my BCP to check. Although I do have the option to turn them off (Pro license).
I believe Windows Automatic Updates are enabled.