To control the shared Internet connection

Open Network Connections.
Right-click the icon for the shared Internet connection, and do one of the following:
To connect to the Internet using the shared Internet connection, click Connect or Enable.
To disconnect the shared Internet connection from the Internet, click Disconnect or Disable.
Notes

To open Network Connections, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
If your network uses a dial-up Internet connection, Connect connects you to the Internet using the shared Internet connection. If your network uses a high-speed Internet connection, Enable provides the same service.
If your network uses a dial-up Internet connection, Disconnect disconnects your shared Internet connection from the Internet. If your network uses a high-speed Internet connection, Disable provides the same service.
If the Allow other network users to control or disable the shared Internet connection check box has been selected on the Internet Connection Sharing (ICS) host computer, you can activate the shared Internet connection from a client computer by double-clicking the shared Internet connection icon, which is located in the Network Connections folder under Internet Gateway.
If the Allow other network users to control or disable the shared Internet connection check box is selected on the ICS host computer, and the Show icon in the notification area when connected check box is selected for the shared Internet connection on the client computer, you can disconnect the shared Internet connection by right-clicking the taskbar icon and selecting Disconnect.
If the Allow other network users to control or disable the shared Internet connection check box is not selected, client computers on your network are unable to control the shared Internet connection.
When you disconnect an active shared Internet connection, all of the active Internet sessions on your network terminate, and the icon for the shared Internet connection disappears from the notification area on the taskbar until the connection has been reactivated by any of your network computers.
To enable Internet Connection Sharing (ICS) Discovery and Control on Windows 98, Windows 98 Second Edition, and Windows Millennium Edition computers, run the Network Setup Wizard from the CD or floppy disk on these computers. For more information about the Network Setup Wizard, click Related Topics.
For ICS Discovery and Control to work on Windows 98, Windows 98 Second Edition, and Windows Millennium Edition computers, Internet Explorer version 5.01 or later must be installed.