How to Releasing an IP Address in Windows 2000 / XP?
Click Start, then click Run Type Command and click OK Type ipconfig /release and press Enter Your IP Address should turn to 0.0.0.0 . To Renew your address check Renewing IP Address. If you receive an Error The operation failed as no adapter is in the state permissible for this operation. Then you might need to set your Network adapter to obtain your IP Address Automatically.