Hiding an identity of a computer commonly referred as IP address is primarily done to conceal your identity and location. Some methods rely on completely hiding all or part of the IP address and some methods simply change the IP address to a new one via a free or fee-based proxy server. Remember that some Internet Service Providers (ISPs) limit the number of times a new IP address can be issued.
Following steps explain how to hide a computer's ID in Windows XP.
1). Unplug your modem and router from the power outlet. Unplug all cables that exist between the computer, modem and router. Plug back in the modem, router and all the cables to their proper places.
