How to disable user registration?

We have already a database of our clients and we do not need new registration.

How can we disable registration of users?

I am not sure if this is what you are tlaking about or not, but on the Admin…Settings page there is an option to ‘Disable Anonymous Checkout’ if the check is cleared the user does not have to register to checkout.

Yeah, but he can register and I do not want people register at all.

Can you just remove or comment out the registration link?