title: Can't update Visual Studio 2017 RC
body: <p>I'm trying to update <em>Visual Studio 2017 RC from 15.0.25909.2 to 15.0.25914.0</em> and when I hit <strong>Update</strong> button it throws following error</p>
  
  <blockquote>
    <p>Path to vsix file 'update' is invalid or you don't have required access permissions.  Please check the path is valid and you have required access permissions.  </p>
    
    <p>Usage: VSIXInstaller.exe [/quiet] ...<br>
    ...</p>
  </blockquote>
  
  <ol>
  <li>I ran it as <em>Administrator</em> unfortunately same issue occurs.</li>
  <li>Recorded Screen-cast is <a href="http://www.screencast.com/t/a0I0eQn8E" rel="nofollow noreferrer">here</a></li>
  </ol>