I want to reinstall windows xp and I have the CD but I don't have the serial number anymore. I lost all of the packaging when I moved to my new place and just have the CD in the cd book with my other software. My question: Can I retreive the serial number off of my computer some how? I have used the CD on this computer before and used the serial that came with it but can that serial be found on my comp now? Thanks in advance.