How to Remove a Wireless Network in Windows 7
Information
This tutorial can be used to show you how to remove a wireless network from within the Network and Sharing Center.
This can prove handy if you are having internet connectivity issues whereby you can connect to the network but it has limited access.
Here's How:
1, Right-click the network icon on the taskbar.
Note
You can also access it through Control panel 'Network and Internet' followed by 'Network and Sharing center'
2, Once open, click 'Manage Advanced Networks' in the left hand panel 
3, Left-click the wireless network you wish to remove, then click 'Remove' from the panel above
Note
You can also right-click the network and select remove from the context menu
4, Confirm deletion by clicking 'Yes' on the confirmation box
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