For those with Win10 who might be experiencing this issue:
“Windows 10 1803 Upgrade Issues - The Black Desktop Of Death And How To Fix It”
http://www.thecomputercellar.com/windows-10-1803-upgrade-issues-the-black-desktop-of-death-and-how-to-fix-it
> Windows 10 1803 Upgrade Issues - The Black Desktop Of Death And How To Fix It
Excellent!