Active user account after administration's confirmation How to, by using module Profile2 Registration Path, the user's account becomes active after it is activated by the administrator. The administrator should get email when user creates new account.
I don't think you need a contrib module for that. You can set " Visitors, but administrator approval is required" under "Who can create accounts" on admin/config/people/accounts. 

As for sending e-mail, create an advanced action at admin/config/system/actions and then set it on admin/structure/trigger/user to be triggered by account creation.

The core Action and Trigger modules are all that are required for that.