If you try to install (non-embedded), the installer might pick up the BIOS key, but it will likely throw an error because the key is for an "Embedded Industry" edition, not a "Standard Core" or "Pro" edition.
If the device was pre-activated with an OEM key (embedded in BIOS), this will display it. windows 8.1 embedded product key
Even with a valid key, you may encounter errors. Here is how to fix them. If you try to install (non-embedded), the installer