To connect a computer to a domain,
1. Start Control Panel and double-click Network.
2. Double-click Client for Microsoft Networks and click Properties.
3. Select the option of Log on to Windows NT domain.
3. Type in the correct domain name in the text box of Windows NT domain and click OK.
4. Click OK again.
5. Click Yes to restart the computer.
6. At the Windows Logon screen, type in the correct username and password supplied by the network Administrator and click OK.