I agree aviv00, win7 is more like vista second edition, its just ms is calling win7, and not vista SE. (am sure u knw why ms wouldnt link vista name with win7) Anyways, we will have to wait for beta 1 to see any performance increase over this pre-beta, if there is more speed compare to this pre-beta build, then we can expect more tweaks and more speed in beta 2. And the same performance of win7 can also be gained with vista sp2 (am pretty sure)