You've brought an XP Upgrade CD, or a Full XP CD?
Because Upgrading to XP from Me won't work - you'll need to format it and install it from a fuill XP CD. Unless you have a full Windows 200 CD? Then you can format the PC, install 2000, and upgrade to XP - that'll work.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.