The Network Identification wizard is now called the Join a Domain or Workgroup wizard. It helps you join a domain or workgroup and create a domain user account on your computer. To open the wizard, follow these steps:
Open System by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking System.
Under Computer name, domain, and workgroup settings, click Change settings.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
On the Computer Name tab, click Network ID.
Before running this wizard, make sure you have a user name and password with permission to join or leave a domain, and that you have the administrator password for your computer.