Click the down arrow and select a computer name from the list, or select a name from Users.
Click Add to include this user in the list of Assigned Users.
Click Remove to delete this user from the list.
Assigned users are added to the Local Administrators security group. It is recommended that you move users to the appropriate local security group after the computer is set up.
In a Windows domain, the members of the Domain Admins security group are automatically added to the Local Administrators group of all computers in the domain.
Only users in the Active Directory can be assigned to the Local Administrators group. This wizard cannot create new user accounts and computer accounts. To assign a computer name that is not listed, run the Set Up Computer Wizard on the server to add it to the list.