Thing refused to boot up this morning, tried usual reset button pushes, then rushed for work so took it to PC World where I bought it. Person there said that Surfaces couldn’t be booted from a standard USB startup drive, it had to be a special one created from your own Surface before it borked itself, so it would have to go back to Microsoft and might well lose all data.
Sounded a bit off to me, but had to get to work so left it with them.
Now, looking at the Microsoft website, it looks as if I just need to log in, give them the serial number, and I can download a recovery image. Is that right?
Cheers 😉