Once you've found the product keys for Microsoft Windows and Microsoft Office, print them out and keep them somewhere safe! There's no need to go through this process twice.
Tip: Did you have trouble using Keyfinder or did it not find your product key? Try another free product key finder program. Winkeyfinder is great but if it doesn't work as you expected, it's not of much use. Another free key finder program might do the trick.

