I'm running Vista 64. 8.0 had an annoying problem in that it would not minimize and maximize (at least on my system) correctly. Had something to do with certain media being present in the project. Mostly had to use Task Manager to maximize Vegas once minimized. This seems fixed in 9.0 --- so far! .. If this bears out, GOOD GOING SONY VEGAS TEAM !!

My install went flawlessly.