Use the following steps to change your ip address :
There are two types of ip address we are using 1)Static ip address2)Dyamic ip address If you have dynamic IP, then change your IP address by following the steps:-1)Go to Start->Run->Cmd and Press Enter..Type in "ipconfig/release" for Current IP address and then type "ipconfig/renew" for New IP address.2)Either follow step 1 or Simply restart or unplug your modem/router .Doing either step 1 or 2 will change your Dynamic IP address. Visit http://www.ip-details.com to check your IP address is changed or not
It all depends upon why you want to change your IP address. If you want the outside world to see a different address (because you have been banned from a site, for example) then you need to change the address on your router, not your computer. Depending upon your ISP, this can be difficult or impossible. And be aware that many sites are aware of this sort of cheating; a temporary ban could easily turn into a permanent one and an official complaint to your ISP.