To change the Internet Connection Sharing host computer

Disable Internet Connection Sharing (ICS) on the computer that is currently sharing its Internet connection.
For instructions on disabling ICS in Windows 98 Second Edition, see To disable Internet Connection Sharing in Windows 98 Second Edition.
For instructions on disabling ICS in Windows Millennium Edition, see To disable Internet Connection Sharing in Windows Millennium Edition.
For instructions on disabling ICS in Windows 2000, see To disable Internet Connection Sharing in Windows 2000.
Start the Windows XP Network Setup Wizard.

To start the Network Setup Wizard, click Start, click Control Panel, click Network and Internet Connections, and then click Network Setup Wizard.
If you are sharing an Internet connection on the Windows XP ICS host computer, ICS is enabled on this connection when the Network Setup Wizard is run.
The Network Setup Wizard can only be run on computers running Windows 98, Windows 98 Second Edition, Windows Millennium Edition, or Windows XP.