As well known by default Win10 allows only to defer Feature Updates but not to block them (forever).
However there are some 3rd party tools which allow to block them anyway e.g.
- StopWinUpdates - Wu10Man - StopUpdates10 - Sordum Update Blocker -...
Call this a feature if you want, but it's a terrible one..
Things you'll need setup to reproduce the issue:
Windows 10, Version 1703, OS Build - 15063.296
A PIN/Password code login
Display timeout of 1 minute
By pressing the Windows Key,...