How to delete a wireless network profile in Windows 7
How to remove the existing wireless network profile in Windows 7
If you are unable to connect to your wireless network in windows 7 after changing settings such as the password, deleting your wireless network may resolve this issue. It is also a good practice to remove any wireless networks you are no longer using so that you can find your frequently used wireless networks easier.
=> Many times after reconfiguring the wireless router, the wireless router does not want to connect to Windows 7, one of the reasons is to reset the password to the previous WiFi name. The way to get rid of this is to remove the previous wireless profile and reconnect
Go to Wirless Icon
If click Wirless Icon then Click Open network and Sharing Center (red mark)
Manage wireless networks
Remove your networks
The best practice is to remove the profile of the WiFi that will not be used