title: WebClient call works in WinXP but not on Win7
body: <p>The following call returns a result in WinXP but not on Win7:</p>
  
  <pre><code> using (WebClient client = new WebClient())
              {
                  var result = client.DownloadString("https://secure.plimus.com/jsp/validateKey.jsp");
              }
  </code></pre>
  
  <p>I get "System.Net.WebException: The operation has timed out" exception</p>
  
  <p>What is it that I'm doing wrong?</p>