So, first start CMD. Most of the time CMD is built-in on the computer.

Opened up CMD? Good. Now let’s go and try to get the password.

Step 1: Check what connection the computer is connected to and keep it in mind or write it down. You’ll need it.

Step 2: Now type “Netsh wlan show profiles” in your CMD window to show a list of connections the computer has ever connected to.

Step 3: Obviously the connection of the computer is in that list.

Step 4: Now type the command “Netsh Wlan show profiles [network name] key=clear”. It will show all the information about the network + the network key.

In the section Security Settings there is a line called Key Content. Behind Key Content is the key to WiFi connection.
Enjoy the trick!!