WiFi Password lost or forget dont worry here a simple and easiest solution to recover that with a free utility software. WirelessKeyView recovers all wireless network security keys/passwords stored in your computer by the ‘Wireless Zero Configuration’ service of Windows XP or by the ‘WLAN AutoConfig’ service of Windows Vista, Windows 7, Windows 8, and Windows Server 2008.
It allows you to easily save all keys to text/html/xml file, or copy a single key to the clipboard. You can also export your wireless keys into a file and import these keys into another computer.
Any version of Windows starting from Windows XP with SP1 and up to Windows 10.
You must login to windows with admin user.
Source : nirsoft.net