He hasn't activated yet - imo it's good practice not to activate 'till you have to anyway though, as if your OS is going to curl up and die anytime, it's when you first install it.
EDIT - Harjun, if you do get a Quad Core you will need to re-install Windows anyway - if your buying a Vista OEM it's probably best to only install it once, perhaps you could buy that when you buy the CPU, rather than buying it now?