Once you've found your product keys and serial numbers, 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 Thing or did it not find the serial number you were looking for? Try another free product key finder program. Keyfinder Thing is great but if it doesn't work as you expected, it's not of much use. Another free key finder program might find what you're looking for.
