Follow the instructions in How to install or upgrade to Windows XP to start the Windows XP Setup wizard.
Follow the onscreen instructions in the Windows XP Setup wizard until you get to the “Workgroup or Computer Domain” window.
Enter the Active Directory domain you want the Windows XP workstation to join, then click Next.
If the Windows XP Setup wizard cannot find the domain controller for this domain, enter the IP address of the domain controller in the Internet Protocol (TCP/IP) Properties window.
From the Start menu, choose Control Panel. Go to Network and Internet Connections > Network Connections.
Right-click the local area connection that you want to modify, and then click Properties.
On the General tab, in the “This connection uses the following items list,” click Internet Protocol (TCP/IP), and then click Properties.
For more information, see How to troubleshoot TCP/IP connectivity with Windows XP.
Continue to follow the onscreen instructions in the Windows XP Setup wizard until all steps are completed.