title: Windows shutdown not working as expected
body: <p>I'm trying to remotely shutdown computers in my lab with the commands:</p>
  
  <pre><code>shutdown /s /m 192.168.1.57
  shutdown /s /m 192.168.1.56
  </code></pre>
  
  <p>Shutdown occurs properly when I run each command separately.  But when I combine them via:</p>
  
  <pre><code>shutdown /s /m 192.168.1.57 &amp; shutdown /s /m 192.168.1.56
  </code></pre>
  
  <p>only one machine shuts down, then Windows gives an error:</p>
  
  <pre><code>The entered computer name is not valid or remote shutdown is not supported on the target computer. Check the name and then try again or contact your system administrator.(53)
  </code></pre>
  
  <p>Any ideas how to troubleshoot/resolve?</p>
  
  <ul>
  <li>same issue occurs when I combine the commands in a batch file.</li>
  <li>systems all running Win 7, connected to the same workgroup.</li>
  <li>bear in mind that I am not an IT professional.</li>
  </ul>
  
  <p>Thanks in advance.</p>