
Originally Posted by
Erik
You aren't allowed to install windows XP on more than two PC's at once.
But if you remove it from your old computer, and install it on your new computer, then it's allowed. (this isn't allowed with Vista, btw, with Vista you have to buy a new copy after every major hardware update)
You do need to inform Microsoft that you migrated your copy of Windows XP to a new computer, so they can validate the new installation and disable the old one.
If you don't validate your installation it will still work (apart from the annoying messages), but you won't be able to receive updates.