title: how to release localhost from Error: listen EADDRINUSE
body: <p>i am testing a server written in nodejs on windows 7
  and when i try to run the tester in the command line i get the following error</p>
  
  <pre><code>Error: listen EADDRINUSE
  at errnoException (net.js:614:11)
  at Array.0 (net.js:704:26)
  at EventEmitter._tickCallback (node.js:192:40)
  </code></pre>
  
  <p>how can I fix it without rebooting?</p>