What you may not understand yet is that the Metro interface IS the start menu. They took what was formerly BURIED beneath the start menu and lifted it to be your primary interface. Thats why when you swipe the right side of the screen and press the START icon it takes you to the Metro interface.
If you want quick access to the administrative functions that used to be available on the start menu, you need not look any further than pressing the WINDOWS+X key combination.
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