i just installed 7 (RC 7100) yesterday on my notebook, its a few years old, compairing it to my gfs laptop, im running a core duo 1.6 with 1 gig of ram, shes running a brand new sony vio with c2d 2ghz and 4gb ram, my notebook flys by hers without a doubt, will diffently buy it when the full retail version comes out cause other then a few querks here and there, its amazing