Reinstall TCP/IP in Windows XP
 

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TCP/IP must be installed on Windows Xp. There are 2 ways to reinstall TCP/IP in Windows XP:

1.
1) Go to Start Menu -> RUN
2) Type "command" click OK
3) IN the new window that pops up type this "NETSH INTERFACE IP RESET LOG.TXT"
This should reset your TCP/IP parameters allowing you to connect again.

or

The second way is secret!