Retrieving Windows Key from BIOS

[MisguidedChoices]

So we recently had a power outage at my work place, a restaurant, and upon rebooting our POS system which ran on Windows Embedded, attempted to boot into a blue screen. Same result when launching into safe mode, or attempting a recovery image. I'm going to be attempting to retrieve the Windows Key if possible from BIOS, but besides this one video haven't found much that could be helpful. I know with newer windows versions it's easy to download OS installer to install from a USB drive without a key, but I need to find out if it's possible for the specific version of Windows Embedded, which I won't know until looking around tomorrow, is available to do the same and if not, what the best replacement option is as a full version of windows plus full POS programs would be too much for the system to handle. 

[RobFRaschke]

It's not on an official microsoft sticker on the POS system?

[Enderman]

You can reinstall windows and it will activate automatically, you don't need the key.

 

Also windows keys are not stored in BIOS.