You'd pick the Win 7 group, because those are the guys that save you money with every task. They are the guys that want a streamlined interface, an interface that offers everything for power users and the basic newbs. I know Change is the biggest problem with people when you're implementing a new system, but if, after a year, people are still complaining, the " change" probably isn't the problem and you should really look at why the hell you pushed that new system in the first place. Yay, I bought a new OS, I need to buy extra software to get functionality back that the Old OS had and the new system lacks in intuitiveness, flexibility and control. Oh yeah, the users are the problem That's the experience of a real IT guy M$ had to learn with Millenium as well, they had a superb OS with Windows NT already. I ran NT 4 in dual-boot with Win95 and loved it a lot, except it was lacking in DirectX support. Microsoft actually had a very, very good OS with NT 5 and although they did skip some things in 2000, it wasn't bad at all.