Hi Rob
Glad you got a fix for your problem. The problem I had was obviously different to yours – i.e my update options were not greyed out , just unable to update - but while I was experimenting I found something very interesting. I have my operating system and programs on a solid state drive (C:) and all my data on a separate conventional drive and keep a clone of the C drive so that if there are big problems I can drop in the clone and it’s not too out of date regarding updates. I found I had a clone dated April 2017 so tried that today and it had exactly the same problem I had recently regarding not updating. I thought that rather strange because I hadn’t experienced this problem until Nov 2017, in other words, it doesn't appear to be a particular update that caused the problem. That leaves me very puzzled!! It’s as though the problem was created as soon as it booted. I was connected to the internet at the time but when I checked the updates installed, the last one was in April. Can’t get my head around this one!! I was able to put this problem right by following my earlier procedure of changing the update option to ‘Never check for updates’. So, I’m none the wiser as to what is creating this problem in the first instance. Whether Microsoft can throw any light on this I don’t know, but would be interested to hear! For people who have their update settings as ‘Install updates automatically’, they will not be aware updates are not working, as you get no indication of this problem until you come to update manually!