title: What exactly does "shutdown -y" do?
body: <p>I tried some random parameters after the <code>shutdown</code> command in PowerShell 2.0 when I stumbled upon <code>shutdown -y</code>. All it <em>seems</em> to do is log out the user.<br>
  if any other random letter is used (that isn't a valid parameter) nothing happens. For example: <code>shutdown -b</code></p>
  
  <p>My question is: Does <code>shutdown -y</code> do anything special?</p>
  
  <p>I could not find any documentation about this.</p>