I read in some where that Microsoft rewrote every single line of code in Vista creating a completely new Operating System. I really don't know if this is true but one thing is for sure, many things have changed in Vista.
For example, now the "Add and Remove Programs" now is called "Programs and Features"and of course, it looks a lote better.
Microsoft has added a new tool to Vista just to change the file association.
Another new feature added is a "Parental Control" tool.
I have been using Vista for almost two days now and Today when I switched back to XP felt like a fish out of the water.