when the Password for a wireless connections is stored in Windows it can be red from command line.
Look for your WLAN Profile (SSID)
D:\> netsh wlan show profile
Userprofile
-----------
    MyWLANZone
And simply show the key
D:\> netsh wlan show profile MyWLANZone key=clear
...
    KeyContent            : MySecretKey
...
原文: 
https://michlstechblog.info/blog/windows-get-wlan-keys/#more-6341