Hi,
Thanks for the response. I know about the CD Key recovery tools. However, I understood the process as when you install the OS for the first time, and then register with Microsoft (time limited) that install key will show up with Microsoft as a used key. If you reformat and try to use it again, it will error out saying that the key is already used or not valid. I understood that you had to deactivate the key so you could reuse the same key again without the Microsoft register servers complaining that the key has already been used.
Dave