Change IP address in Windows 7,8

To change IP address automatically in Windows 7 follow these steps:

1. "Start" and then go to "Control Panel"
2 .Left click on "Network and Internet" and then choose "Network and Sharing Center"
3. On the left side choose "Change adapter settings"
4. Right click on your network card and from the drop-down choose "Properties"
5. Under the "Networking" tab
6. Choose "Internet Protocol Version 4 (TCP/IPv4)" or "Internet Protocol Version 6 (TCP/IPv6)" and then       click on "Properties"

7.  In next window you have option between "Obtain an IP Address Automatically" and "Use the following        IP Address"

8. You need almost always to select "Obtain an IP Address Automatically" to change IP address                       automatically
9. Finally click on "OK" and your IP address should be changed.