Quote Originally Posted by dh52726 View Post
i gotta disagree on that.

Win 7 is a significant rewrite of Windows, its GUI is an update to Vista but thats about it. Of course it shares the same core kernel but its has to otherwise it wont be Windows.

Every new OS is essentially a big service pack to the old one.
Vista was a much bigger change from XP (eg. driver model and a whole bunch of stuff) whereas the changes between Vista and 7 are much less. More re-write happened XP > Vista than Vista > 7.