Are you constantly using different Wifi access points and mobiles or modems with your Windows 7 to connect to Internet? Then you might probably have the problem of having unwanted connections in your Network Connections list. Searching through the control panel will not give you the solution like we have in our beloved Windows XP.
Rather it's here:
Click Start-> (Type) View Network Connections (in the Search box)-> Select the unnecessary connections and press Del.
Now you have cleared the list :-)