On your Desktop, hover and right-click on the WiFi icon located at the bottom right of your screen. Select Open Network & Internet Settings.
Under Change your Network Settings, select Change adapter options.
Right-click on your WiFi network connection and select Status.
The WiFi status window shall appear and click on the Wireless Properties button.
From the Wireless Network Properties, click on the Security tab, and check Show characters. Please note that you’ll need to have Administrator Access in order to view this information. Once you have checked on Show characters, you should be able to view your saved WiFi password at the Network Security Key.