Check out the following sites: http://pcsupport.about.com/od/productkeysactivation/tp/topkeyfinder.htm http://www.pcreview.co.uk/forums/find-product-key-cd-t626945.html http://ehacks.wordpress.com/2008/01/11/how-to-find-your-windows-xp-product-key-on-the-windows-xp-cd/ Or "google" "find CD product key" or "find Win. 98 CD product key" or some such search.