Inexperience is a shell modification pack that replaces XPish resources with their counterparts from Windows 2000. There are a lot of advantages to using the newer operating system, especially after the release of Service Pack 2; if you don't feel the iconset is one of them, now it doesn't have to be a disadvantage.
I think that many people other than me might want to use the older style out of nostalgia, because they find it to be cleaner and more usable, or simply out of a preference for pixel-art. An interesting side effect is that it also makes the computer run remarkably faster!
Download it here!