Hi,
I did KB4074594 manually. The result was the same. If it helps, the pattern has always been, I restart after the installation, it goes through the restart and does 9% of updating during shut down, after the splash screen, it give the message we couldn't complete the updates, undoing changes, then it restarts again, and appears to attempt the update again, gives the same we couldn't complete the update, and brings me to the log in. Attached is the new CBS.