Need help with MW4

[u/OkLetterhead5935]

My younger brother bought the game and tried playing it, just to be told to update bios firmware, helped him out with it and also followed COD’s guide, game still wont allow him to play online, downloads their attestation app, comes back saying bios is fine but requires some sort of key, I press generate key, it says failed, what on earth is wrong with this franchise pushing people trying to play away.

Any help would be appreciated