How can I do if my PC Black Screen?

I received some kind of system updates last evening On both my laptop running Home and desktop running Pro. Both were left to install with the laptop set to turn off upon completion. This morning I started the laptop which was a normal process through the fingerprint sign into Windows, which resulted in a black screen and my cursor. Alt Ctrl Del brought up the Task Manager. With use of the cursori could select applcations that were running and stop them, or change users, which took me back to the Windows sign in screen. With TM open I got three icons at the bottom right of the screen (wifi, change user, and power), all functional Signing in repeats te above Black Screen:

Going to the Desktop, which had rebooted after install, and was awaiting sign in, I typed in my Windows pass code and every thing was a repeat of what happened on the laptop.