For some reason the Operating system is unable to properly read the BIOS SLIC table on which it depends to self-activcate teh OEM_SLP License in use.
The solution is to change the Product Key to the one on your COA stiaker on the machne's case, and then activate by phone.
Open System Properties, and scroll to the bottom of the page - cick on the Change Product Key link there, and follow the instructions - when it comes to activation pick teh alternative method - phone.