Forget your WiFi password? Here's a trick to reveal it in Windows 10 from a command prompt or powershell run as administrator. To quickly start an admin power shell press the Windows Key and X together then when you see a popup menu in the corner of your screen press A (Win+X -> A). Once at an admin command prompt or power shell enter the following command replacing ReplaceWithYourWifiName with your SSID.
netsh wlan show profile ReplaceWithYourWifiName key=clear