https://www.theregister.co.uk/2017/09/19/black_screen_after_windows_update_microsoft_says_blame_hp/

Microsoft is pointing the finger of blame at HP's factory image for black screens of death appearing after a Windows Update.

Scores of PC owners took to the HP forums last week to report that Windows 10 updates released September 12 were slowing down the login process. Users stated that once they downloaded the updates and entered their username and password, they only saw black screens for about five to 10 minutes.