Yes, I can even see the picture by closing my eyes.
I've got it put back, but I've seen numerous posts over the years talking about updates causing problems. Until this moment, for me, W10 has worked as it says on the box and I'm kind of unnerved by the blackness of the black screen. Every so often I've seen systems that go to one default Windows background or another but this not only took my picture but altered the usual brightness of the monitor an HPfw 24". However, that's not entirely new. Just now and then it would be too bright and a restart would bring the video back to how it was. Probably just the system talking to Nvidia, but odd. Just two or three times since W10, so no big deal. This time the Nvidia software had gone to being controlled from outside. I switched back to Let Nvida control settings etc., but had to reset gamma etc.
I just wondered if I was not alone with this update issue.