Inspiron 5767, I am selling so tried to factory restore which has failed.  Trying to reboot now and hitting F12 simply tells me there's a problem.

I used Dell Media Creation Tool to put a Windows 10 image on a USB and thought I'd get around it that way but it is now asking for a Windows product key......hitting skip takes me to a screen where none of the available drives are suitable for installation.

Are Dell for real?  How do I simply get the factory restore option to work?