Winkeyfinder is a free and easy to use program that will find your Windows and Office product keys (sometimes called serial numbers). Winkeyfinder works for nearly all Windows operating systems like Windows 7, Windows Vista, and Windows XP. You need the original product key that came with your Windows purchase before you can reinstall Windows.
For an overview of what Winkeyfinder is capable of, see my complete review of Winkeyfinder v1.73 RC2.
Winkeyfinder is a free software program that finds product keys so the first thing you need to do is visit the Winkeyfinder website so you can download the program.
Winkeyfinder is a completely free program and you should not be charged a fee to download or use it.
Note: The detailed instructions I've put together here walk you through the entire process of using Winkeyfinder to locate your lost Microsoft Office and/or Microsoft Windows product key so feel free to take a look at the entire tutorial before you get started.