Inspired, I went a different route, didn´t think you could make a USB boot except on the computer that already had the W10 update. Anyway took my main PC ( W 8.1) and used the download as described...

Night Hawk - lots of info here - at my speed it will take a day or to read fully and test.

I put W10 on VMware on a new - hardly used laptop - and then took the full update.

Intended from start...