The Magical Jelly Bean Keyfinder is a freeware utility that retrieves your Product Key (cd key) used to install windows from your registry. It is a single .exe file. Just download it and run it to instantly retrieve your Windows Product key. It retrieves the key of Office as well. It also lets you change the product key.
With the Keyfinder you can retrieve the Product keys of installations on a remote computer in the network.
Once retrieved you copy the key to clipboard, save it to a text file, or print it for safekeeping. It works on Windows 95, 98, ME, NT4, 2000, XP, Server 2003, Windows Vista, Office 97, Office XP, and Office 2003.