This has happened to me at least once a year since I migrated or installed a new paid-for version of Windows 10 Professional (or 7 and Windows 20xx server and...) Updates do not complete and revert back, and most of the messages refer to the usual: not enough space on the 500mb partition that is used for restoring Windows, .NET incompatibilities or some errant program Windows doesn't understand or like, and of course the old "just reinstall Windows and waste your entire weekend" solution. I have tried all 3 at one time or another but it's generally not worth the time and effort on the reinstall Windows. I, like many people that work on PCs for a living do: just skip the errant update until the MSoft engineers create another that does function and does install. Indeed, there will be security issues that occur if you do not update (as if this is NEVER THE CASE). But I create regular backups internally and externally with multiple programs protecting me against malware, viruses, and encryption schemes. I don't trust no one. Even MSoft.
So it goes.