Winsock In Service Pack 2

Click Start/Run, launch cmd and enter netsh winsock reset catalog.
Reboot

VERIFY IF THE COMPUTER HAS A VALID IP NOW

Install TCP/IP
1. Right-click the network connection and then click Properties
2. Click Install.
3. Click Protocol, and then click Add.
4. Click Have Disk.
5. Type C:\Windows\inf, and then click OK.
6. There are now 3 possibilities

A. On the list of available protocols, click Internet Protocol (TCP/IP), and then click OK
B. If no protocol was found in C:\Windows\Inf verify if the c:\i386 folder is present and navigate to it

a. On the top of the window click Search
b. On the left choose all files and folders
c. Search for the file name: nettcpip
d. If the file was found right click on it and choose install

C. If c:\i386 doesn’t exist use the XP CD

a. Open a command prompt
b. Type in expand d:\i386\nettcpip.in_ c:\windows\inf\nettcpip.inf
c. Go to step 1.

7. Restart the computer

VERIFY IF THE COMPUTER HAS A VALID IP NOW

If you are still getting an ipconfig error  that is not related to the DHCP server:
Click Start/Run, launch cmd and enter netsh winsock reset catalog
Reboot