Open a DOS window then type the following substituting “INSERT SSID HERE” with your network’s SSID (no quotes)…
c:\users\SSID>netsh wlan show profile name=mywifinetwork key=clear
should produce an output which includes something similar to this…
Security settings
—————–
Authentication : WPA2-Personal
Cipher : CCMP
Security key : Present
Key Content : this_is_the _password