Changes to "Windows Genuine Advantage"

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Windows 95 had 15 million lines of code.
Windows 98 has 18 million lines of code.
Windows XP has 35 million lines of code.
Windows Vista has 50 million lines of code, (40 percent larger than Windows XP).

One has to wonder though how much of this code is for copy protection and antipiracy rather than for its initial conception as an operating system.