@TheCruelangel. Interesting lists of products by years release. I guess considering how fast time seems to be passing by us the amount of years seems so little compared to the last two decades. It looks as though windows vista was the in development the longest. I have to wonder if it was actually a completely new OS built from scratch and maybe that's why it had all sorts of problems when it was first released. Seven years would be more then enough time to re-invent a windows OS.