I have an Aurora R4 with the latest A11 BIOS installed. It (had) windows 8 with all the latest updates before trying this.
I attempted an upgrade from within the already running OS. This kept failing so I finally ended up doing an install from a bootable USB stick created using the windows media creation tool. I still have my windows 8 directory intact on the PC's C drive, so I don't think this would be considered a clean install, but it doesn't seem to activate. I haven't taken the next step of a full format since windows 10 seems to be running now, its just not activated.
How can I tell it to look in the Windows.Old directory to figure out the activation? I really don't want to re-install the default Dell media just to see it fail again, as I see other posters have tried.