I bought a 3.0 USB especially for the job but I'm about to give up for the day. I wanted to try basic Arch, then I tried makeiso, then antergos. I have 3 iso images all behaving the same way. Like this:
I use Rufus to make the iso image. It completes successfully ( I can see the files + autorun etc..). I then go to Window's Advanced Startup Options/Recovery and 'Restart'. When I get the option, I choose 'Boot from Other Device, USB etc..') Then on the next screen I pick my new sandisk stick.
Then it just starts as normal. I have tried loads of different ISOs and tried different permutations of options on Rufus. What should I check next?