I'm pretty sure anyone computer-savvy knows that Windows XP was built off of 2000, and that every mention of 2000 was removed. Well, as it turns out, there is one mention of 2000. While deleting system files (in a VM of course), a restore critical Windows files screen appeared, and said to insert an XP SP2 Disk. When I clicked on more information, however, this appeared: Can't see it? Here's a closer look: A bit strange, isn't it?