Freeware Descriptions:
WirelessKeyView recovers all wireless network keys (WEP/WPA) stored in your computer by the ´Wireless Zero Configuration´ service of Windows XP. It allows you to easily save all keys to text/html/xml file, or copy a single key to the clipboard.
Here is complete features (taken from authors site):
System Requirements:
- Windows XP with SP1 or greater.
- You must login to windows with admin user.
What´s New in version 1.20:
- WirelessKeyView now allows you to extract the wireless keys from external instance of Windows XP. (In Advanced Options)

File Size / OS:
- 47.6 KB / Windows 9x - ME - 2000 - NT - XP - 2003 - Vista
Download WirelessKeyView 1.20: