[Solved] Your device or computer could not be verified

Hi.

I am trying to install El Capitan in the following system:
- GA-H55M-UD2H
- Ati HD 5770
I used the DSD attached in the post: https://www.tonymacx86.com/threads/ga-h55m-ud2h-v1-3-no-lan-interface.197980/

Apparently, everything works correctly (sound, graphics, internet) except the login to the app store (and I think that iMessage).
As I read the problem it could be that the ethernet board does not appear as BuildIn in the DPCIManager (see attached image)

I followed...

[Solved] Your device or computer could not be verified