Complete boot failure now after trying to boot from USB. Even after removing USB with Windows 10 ISO, PC will not boot back into Windows 7. Have had to re-image with Windows 7 again.

you've...

Of course, I could just do the in-version upgrade again and stop flapping but I am now confused why I can't even clean install the 32bit version. I would expect to be able to do that at least! I...

Thanks for confirming that. At least I no that bit is right.

My PC is from 2015. F12->Setup shows that I have the option Uefi and Legacy as default. I understood that to mean that it would work...

Or rather, there are people who have managed to migrate from w7 32 to w10 64 by doing the in-version upgrade and then clean installing with the 64 bit. I would just like to know what I am doing wrong.

Thanks for your reply!
That makes sense but why will it not even boot from the 32bit version on the usb? I downloaded both As I suspected the 7/32 -> 10/64 would not work even after the in version...

I upgraded ok with the update and successfully activated windows 10. I downloaded both 32bit and 64bit to usb using media creation tool as I wanted to clean install Windows 10 64bit on my 64bit...