Error 0x803F7001

Value: -2143326207 | 0x803F7001 | 2151641089

What does it mean ?

WINDOWS_STORE_ERROR_UNDOCUMENTED_7001  
Activation Failed Because This Device Doesn’t Have A Valid Digital Entitlement Or Product Key
Value: 28673 | 0x7001 | 0b0111000000000001

Where does it come from ?

FACILITY_WINDOWS_STORE  
Windows Store
Value: 63 | 0x03F | 0b00111111

Other Errors for FACILITY_WINDOWS_STORE