I had the same issue with an earlier update.
Tried creating a second account and made it primary, which made things worse. Even then, I would sometimes start up the computer and get a black screen.
I did find one solution that helped. I pressed Ctrl+Alt+Del and opened Task Manager. Then I could click "File" at the top left and "Run New Task". I typed in explorer.exe and pressed enter. Then my desktop was functional again.
It fixed itself up after another update, but I spent months doing this. I thought I'd mention it on the off chance it helps someone.
On a slightly different note, I woke up on the 22nd to Windows having done it's latest update and wouldn't even get to a black screen, just my laptop logo and the spinning dots. So I did a system restore, which pulled it back to 2 days previously. Unfortunately,
it wiped everything on C drive. There was a windows.old folder which I recovered my music, photos, documents, etc from. Thankfully I did this before windows tried to do it's "yeah, I'm going to go ahead and update again, mmkay?" routine. Unfortunately, I did
not remove my e-mail data for Thunderbird before letting it do it's thing. Now I'm trying to find a way to get my old e-mail settings and messages back. I've tried two different recovery programs. The first one I think I found what I needed, but once found,
wanted me to pay US$80 for the program. The second one does not find full folders that are needed to restore the e-mail settings.
If anyone has any suggestions, I'm happy to try them.