Critically, these keys are with standard Windows 8.1 Pro keys. If you attempt to use a generic Windows 8.1 Pro key on an Embedded Industry image, the installation will reject it, and vice versa.
There are two types of activation keys for this environment: windows 8.1 embedded industry pro key
The Evolution and Utility of Windows 8.1 Embedded Industry Pro Critically, these keys are with standard Windows 8