Problem seemed to be solved by your instrux on how to fix "Failed to connect to Windows service..." But several days later the issues returned. Tried solution 2, and so far things seem okay. Only thing is: last night I found that when I tried checking updates in Settings, the Update and Security window opens but is frozen. Usually when I open that window it shows update status on the right side, but now its blank. And I can't select any of the options on the left side of the window.
I commented on your post and you suggested a Win10 factory reset and that I contact you here.