Actually, the full repair is as follows.
TCP/IP stack repair options for use with Windows XP with SP2 & Vista.
For XP, Start, Run, CMD to open a command prompt.
For Vista, Start, Programs\Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt.
Reset WINSOCK entries to installation defaults: netsh winsock reset catalog
Reset TCP/IP stack to installation defaults. netsh int ip reset reset.log
Reboot the machine.