doesnt sound right--as far as i am aware you have to make the usb bootable then extract the iso contents to the usb--then start the pc and choose boot from the usb drive--i cant see how you could even have started the install at all the way you say if your usb wasnt bootable and contained only an iso file
could you explain how you started the installation?
I have no idea. I just transferd the ISO file to a USB and that was it. I plugged it into my new system and it booted right up. But when it needs to restart to finish instalation it doesnt go back to completeting install it goes back to select language for setup etc.