Lost Windows Product ID Key

The other day, my brother's friend had lost her windows product ID key and I thought that here must be a way to extract the Product ID Key off her computer.

A quick Google revealed that this little tool Magical Jelly Bean Keyfinder can retrive your Product ID Key. Unfortunately, he had already formated the hard drive so this was not an option.

I had a bit of a poke around on the Internet and apparently Micro$oft may also give you your Product ID Key if you can tell them your CD serial number, written on the inside clear ring of the Windows CD. He rang Micro$oft and was provided with the key.