So I have two computers, one is windows XP and the other is windows98se. I pulled the 98se outta my basement because I can use another computer.. I used my windows XP cd that came with my computer and upgraded the win98 computer to XP (deleted the partition, created a new one). Everything works fine, but when I do a windows update it gives me a "Windows activation required" page where I either download a so-called "validation advisor beta", or purchases a "genuine advantage kit" for $99.00 So here's my question, I've reformatted many computers before with my windows XP cd (though they all had XP existing on them), and never once have I been prompted to enter a CD key or validate my copy of windows for that matter. So is it doing this because I went from a 98se OS to a windows XP OS? If this computer had windows XP on it previously and I did the same thing would I run into this problem? And finally, If I validate my copy what will happen? Like I said I've never had this issue in the past, so I'm just trying to understand it. Thanks.