Hi I'm going to upgrade to Vista 64 so I can take advantage of all my system RAM (XP32 only sees 2GB at the moment) and cores. Anything I need to know? Please, you don't need to post any general comments on Vista, but specific ones to running FSX would be useful. Being a mac user I am very luck that the only thing I have to use windows for is FSX! As I don't have any add-ons yet I am going to do a clean install by wiping the partition and starting again....or am I, do i need to do this or should I just let it upgrade itself????