I would like to start over with a new wireless network in Windows 7, but I can't figure out how to remove a previous network. I keep seeing that I should start in the Control Panel and Manage Networks, but that option doesn't come up.
Open the Network and Sharing Center then select Manage wireless networks on the left. Highlight the network, right click and select Remove network.
You can also use Merge or delete as required to delete unwanted networks...