MS took control of my PC so I did not follow every step. I was left with what looked like a full windows 10 installation running; it did not look like a normal update, but more like the full install, but I noticed it went on shutting th pc on and off and then running updates. It said things like We are getting you pc ready etc
Interesting. Maybe it was some kind of a repair install? ISO? I was sceptical as the agent was so quick. It has all the appearances of an install of windows 10 but allowed computer use while it was going on. I worried about losing apps like Photoshop but all was well.