In Windows 7 you should open your Control Panel, go to Network and Internet, then click on Network and Sharing center, then click on Manage Wireless Networks on the left. Here you will see all of the networks that you have connected too. Right click on the connection you need the password for and go to properties. You will have a security tab that shows the security details of the network including the password. Click the box to show characters and you will see your password. I hope this helps.