Whenever I go to View Wireless Networks in Windows, there is always an unsecured computer-to-computer network called "Free Public Wi-Fi". You can't get any connection from it, but why is is always there?
You may have previously connected to an Ad-Hoc network where the credentials were saved. When you do this, Windows usually keeps the settings so you can easily connect in the future.
No matter what version of Windows you are using - make a good tool That should allow you to delete cached/stored connections, Nirsoft Wireless Key View (However, I cannot guarantee this will work as I have never used it with Ad-Hoc connections).
You have not stated what version of Windows you are using.
For Windows XP
For Windows XP, simply go to "Network Connections" and right click your Wireless card, look for the middle tab
For Windows Vista and 7
For Windows Vista and 7, Go to
Here's a possible explanation for how it all came to be, written back in 2006...
The details explain: