My mum has just purchased a new PC with Windows XP Home Edition (SP2). I know, I'm sorry, after extensive conversation, she doesn't want to switch to Mac. Anyway, am I right in saying that a copy of Windows XP can be installed with the same serial number on more than one computer? Or is that only possible with a laptop? I will be getting my mum's old pc, (which has Windows 98SE) which I might use for gaming, it's not particularly good, but I only really play Counterstrike which has very low system requirements. I'd like to install Windows XP on this if possible. I've thought about putting XP on my MacBook, but I'd hate to see that disgusting operating system on such a beautiful peice of equipment.