When you run the Actiuve Directory Installation Wizard on a domain controller, you receive:
The wizard cannot contact the DNS server that handles the name <domain> to determine if it supports dynamic update. Confirm your DNS configuration, or install and configure a DNS server on this computer.
A likely cause of this error is that the wizard is trying to locate your DNS server via a diabled or unplugged NIC.
Plugging the NIC into a hub will enable the NIC.
If you can't, install the Microsoft Loopback adapter.