Reset TCP/IP Stack for Windows XP (SP2), Windows 7

Make a Bat file and run :

REM 1. Reset WINSOCK entries to installation defaults:
        netsh winsock reset resetlog.txt
REM 2. Reset TCP/IP stack to installation defaults:
        netsh int ip reset c:\resetlog.txt
REM 3. Reset Firewall stack to installation defaults:     
        netsh firewall reset 

Article and s/w for custom configuration : 

http://www.speedguide.net/articles/how-to-repair-tcpip-and-winsock-1539