Corrupt Administrator Group

[wildpureheart]

Just adding the detail that if I create a new user (say, admin2), and give that user Administrator rights, I am able to log in with that user, but they do not see the full admincp. This is consistent for all users with Administrator rights.

So, is there a way to fix the Administrator usergroup that it behaves as originally intended?

Once again, any help is greatly appreciated.

Cheers,
Andrew