How to Remove an Internet Connection in Windows Vista
When you no longer need an Internet connection, you can remove it in Windows Vista. Removing old Internet connections can keep your Network Connections window clutter-free and reduce confusion for whoever is using your computer to connect to the Internet.
Choose Start→Network and click the Network and Sharing Center link.
The Network and Sharing Center provides access to a wide range of network features.
Click the Manage Network Connections link.
The Manage Network Connections window shows a list of each type of Internet connection that has been configured on your computer, broken down by type.
Right-click the connection you want to eliminate and then click Delete.
The connection name is removed from the Network Connections list.
Even if you no longer need a connection, as long as you don’t click on it, there’s no harm leaving it in your connections list. However, somebody else using your computer may be unsure about which connection to activate, and your Network Connections window will be more cluttered if you don’t get rid of old connections.