title: Solving SharePoint Server 2010 - 503. The service is unavailable, After installation
body: <p>Installed:
  SharePoint Server 2010 for Internet Enterprise Beta (x64)
  On:
  Windows Server 2008 Standard (x64) on 64 bit hardware</p>
  
  <p>Attempts to access the Central Administration console led to IIS returning 503. The service is unavailable</p>
  
  <p>And this error was found in the Application log</p>
  
  <blockquote>
    <p>The Module DLL 'C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\isapi\owssvr.dll' could not be loaded due to a configuration problem. The current configuration only supports loading images built for a x86 processor architecture.</p>
  </blockquote>
  
  <p>After much ado, the solution turned out to be:</p>
  
  <p>1) Ensure that the enable32BitAppOnWin64 seeting for the "SharePoint Central Administration" app pool is set to False, and the same for the "SharePoint Web Services Root" app pool</p>
  
  <p>2) Edit applicationHost.config:</p>
  
  <p>Change:</p>
  
  <pre><code>  &lt;globalModules&gt;
   ...
   ...
   &lt;add name="SharePoint14Module" image="C:\Program Files\Common
   Files\Microsoft Shared\Web Server
   Extensions\14\isapi\owssvr.dll"
   preCondition="appPoolName=SharePoint
   Central Administration v4" /&gt;
   &lt;/globalModules&gt;
  </code></pre>
  
  <p>To:</p>
  
  <pre><code>    &lt;add name="SharePoint14Module" image="C:\Program Files\Common Files\Microsoft
   Shared\Web Server Extensions\14\isapi\owssvr.dll" preCondition=
  "appPoolName=SharePoint Central Administration v4,bitness64" /&gt;
  </code></pre>
  
  <p>I hope this helps somebody :-)</p>
  
  <p><strong>bitness64</strong> being the magic word here</p>