I faced this problem too. First it was the black screen with a long message. I restarted my com and then I received Sihost.exe and explorer.exe error messages.
Looking through all the various suggestions gave me a headache (total tech noob here).
What I did was forcing my com to enter automatic repair (reboot the com 3 times).
Troubleshoot and head all the way to Restore previous version.
The restoring took about 15-20mins for me and my com is back (and hence I can type this).
I think this would be the easiest way. I don't know if it will work for everybody but it worked for me. I'm taking extra precaution not to let windows update again until this stupid update issue is solved for good.