Ok. So I heard that if you change someything from your system, you will need to re-activate Vista for that. But I need a higher HDD for my laptop as it's only 160GB. Dunno if there are 320 or more GB on laptop HDD. Anyone replaced theirs with Vista installed? The motherboard was changed but the OS didnt asked me to re-activate it since it was replaced by Asus Philippines. Maybe, it's the same motherboard, duh. how about HDD's?