I replaced a failed hard disk on this machine, it came with Windows 8 so I assumed it is supposed to have the embedded key in the system to allow me to reinstall Windows 8 from a Microsoft iso using the embedded key and not requiring me to enter one. I'm not trying to steal windows or anything - I just want to reload the O/S onto this machine from a microsoft iso disk and get it working again.
When I do change it to recognize legacy boot devices, I can get it to boot from DVD and it appears to start the Windows 8 install, but stops at the point where it prompts me for a product key (which I don't have?) - what to do?