Instead of hunting for a ghost key (which doesn’t exist), consider:
Here’s the key fact (pun intended):
When you install a standard, official version of Windows 10, you are asked for a 25-character product key (e.g., VK7JG-NPHTM-C97JM-9MPGT-3V66T ). This key authenticates your license with Microsoft's servers. Windows 10 Ghost Spectre Product Key