Quiet Vista: How to disable the Windows startup sound

If you want to be polite in a quiet place while using a computer, you will mute the sound, but what if you need to restart your notebook there?  For mobile computers that have a hardware sound controller, preventing the startup sound from breaking the silence is easy, but what about the rest of us?  For this problem, Windows has an easy option to disable the startup sound.  How nice!

First open the control panel.
startup sound 1

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