title: Not able to run ASP.NET web app using Development Server
body: <p>My development machine (Vista) was working perfectly fine for over a year and then suddenly (without explicitly installing anything) I am unable to run the websites using ASP.NET development server.</p>
  
  <p>The development web server starts fine, but IE cannot display the page:</p>
  
  <blockquote>
    <p>Internet Explorer cannot display the
    webpage 
    Firefox says - Failed to
    Connect, The connection was refused
    when attempting to contact
    <code>localhost:49447</code>.</p>
  </blockquote>
  
  <p>Here is what I have tried so far:</p>
  
  <ul>
  <li>Disabling firewall</li>
  <li>Stopping anti-virus </li>
  <li>Stopping Windows Defender</li>
  </ul>
  
  <p>It worked when I stopped all services using <code>MSConfig</code> and tried again.
  However, that disables most of the services, so is not a feasible long term solution.</p>
  
  <p>After stopping all services, I tried starting services one by one to find out which one is causing problem.</p>
  
  <p>These are the steps and results:</p>
  
  <ol>
  <li>I found DNS Client Service was
  causing problem.</li>
  <li><p>So I started all others and
  stopped DNS Client service, but then
  Network Location Awareness service
  started causing problem</p></li>
  <li><p>I stopped DNS Client Service and
  Network Location Awareness and
  started all others, btu again
  something else is causing problem.</p></li>
  </ol>
  
  <p>Clearly there is something common and fundamental at the root of this.</p>
  
  <p>I do not know much about networking. Can someone guide me in right direction?</p>
  
  <blockquote>
    <p>Note: I have found another person who
    is having same problems since this
    morning. Looks like it could be
    related to one fo the windows updates!
    Is anyone else getting affected like
    me?</p>
  </blockquote>