title: How to run a PowerShell script without displaying a window?
body: <p>How is it possible to run a <a href="http://en.wikipedia.org/wiki/Windows_PowerShell" rel="noreferrer">PowerShell</a> script without displaying a window or any other sign to the user?</p>
  
  <p>In other words, the script should run quietly in the background without any sign to the user.</p>
  
  <p>Extra credit for an answer that does not use third party components :)</p>