However I came across this post that pointed out that those PCs that had installed Windows 10 1809 hadn't gotten ANY updates since the October Cumulative Update.
This is significant as Microsoft has merrily been fixing the numerous problems discovered in Windows 10 1809 and pushing out new builds to Windows 10 19H1 through the Windows Insider Program.
So I wanted to get updated. But not jump into the fire with Windows 10 19H1.
In the above mentioned howtogeek.com post, a thread in the comments pointed me to a windowsupdate.com URL that contained the CAB file for Windows 10 1809 build 17763.107. Search the comment thread for KB4464455v2.
Microsoft has apparently had problems even with that as there are 2 versions of KB4464455.
To save you some trouble, here's the URL:
download.windowsupdate.com/c/msdownload/update/software/updt/2018/11/windows10.0-kb4464455-x64_de985f6d38215b316470dbecabb453c762a217af.cabNow, what to do with a CAB file?
As has become typical with Windows 10
It took a while and then I had to reboot.