title: HTTP Error 404.3-Not Found in IIS 10
body: <p>I use IIS version 10 and Windows 10 and VisualStudio 2015. </p>
  
  <p>After I add WEB application  to IIS site and open it I get error:</p>
  
  <pre><code>HTTP Error 404.3 - Not Found
  
  The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.
  </code></pre>
  
  <p>I installed IIS sub components from:</p>
  
  <pre><code>Control Panel -&gt; Programs and Features -&gt; Turn Windows features on or off
  </code></pre>
  
  <p>As described in this <a href="https://stackoverflow.com/questions/6425442/http-error-404-3-not-found-in-iis-7-5">post</a> by Mekanik.</p>
  
  <p>Here is screenshot of installed sub components:</p>
  
  <p><a href="https://i.stack.imgur.com/9YftQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/9YftQ.png" alt="enter image description here"></a></p>
  
  <p>But it didn't helped me and still I get the same error.</p>
  
  <p>Any Idea why I keep getting this error above maybe it has something to do with version of <code>IIS 10</code>?</p>