Yesterday 8/14 this monthly update started at some point. 4 hours after I noticed, it was still running and did not complete.
This morning 8/15 - It ran all night without completing, I restored my system from Backup and restarted. Immediately ran chkdsk.
Windows update has started again and been running now for over an hour. Seems to be cycling between downloading, initializing, then installing, then initializing ….
I have no idea how or what to do. Very frustrating I can't even turn it OFF.