Thank you Brink. Should I upgrade to Windows 7 to get Home Premium? Also I'm wondering if that would solve the problem with choppy and frozen video on my PC from video I imported from my new Nikon 3100 digital SLR. Nikon said, "This happens whenever the computer does not have the proper drivers to playback high definition videos". And they said a fast processor and a lot of installed memory- but even that may not be enough because there are "...a lot of factors that determine system performance". Thanks, David in Milwaukee