Just a quick question. I understand that the latest Windows 10 update - KB3194496 - contains 'improvements and fixes' to quote Microsoft.

Considering this update doesn't mention security updates/patches (but that could be implicit in 'fixes' I concede), why am I unable to defer it using Windows 10 Pro (with the defer updates option checked in Settings)?

KB3194496 makes my system unstable, and after a Macrium image restore, it still downloads and installs automatically then prompts for restart.

Thanks for any help you can provide, and sorry if I am missing something painfully obvious.