If you are still connected to the network that you are trying to see the password for, it’s easy.
1. Right click the network icon on the toolbar and select “open network and sharing center.”
2. In the resulting window, click “Change adapter settings,” right click on the WiFi network and select “status” on the drop-down menu.
3. In the resulting pop-up window, select “Wireless Properties” then click on the “Security” tab.
4. You should see a check box beside “show characters.” Check this box, and your password should be visible, although they call it the network security key instead of password.