One way of finding product key is if you buy a original version of Window XP Home Addition or Professional then on CD box you can find the cd or Product Key. Which is showed with a silver outline or if you buy a copy version of Window XP Home Addition or Professional then cd key maybe different from original key? But it is better for a good customer of Window XP Home Addition or Professional that always purchase Window Cd with its Product key.
I have my cd but I threw away the brand new box . I have the recipt from were I bought it but I can't seem to get in touch wih them.