Are we supposed to disable NS/NIS before Windows 10 installs?

You go on holiday for a week and come back to another IT calamity - now Windows 10 is determined to install, even if you don't want it (and I don't, yet), as a normal (except its invisible) Windows Update... (an OS upgrade is a normal update? Really??)... I haven't even got round yet to getting NIS 22.5.2.15 to successfully install without bricking the machines... (that test is this week.)

Anyway, as this (Windows 10 install) is now failing on all my PC's with error 80240020 I wondered if NIS was perhaps preventing the install at all? And should we disable NIS/NS before letting the Windows 10 "update" loose?

Oh and if anyone has a cure for stopping the Windows 10 update I'd love to hear that too - its seems to have downloaded onto the PCs so playing with Windows Update settings makes no difference... removing KB3035583 makes no difference etc etc. Complete 'mare.

(You know I've gone back to XP for now, all these "improvements" are too much... :-))

Many thanks,

David