title: Building Metro Apps for beta testing
body: <p>I have created a Metro application, but I did not yet send it to Windows Store as it's still in beta. One of my friends was interested in testing my application. To install my application on hes computer I used sideloading, following the steps in this article : <a href="http://blogs.msdn.com/b/patricka/archive/2012/11/05/how-do-i-deploy-a-windows-8-app-to-another-device-for-testing.aspx" rel="nofollow">http://blogs.msdn.com/b/patricka/archive/2012/11/05/how-do-i-deploy-a-windows-8-app-to-another-device-for-testing.aspx</a> . The problem is that, when a press "Y" (yes) and PowerShell   should install my app, it gives an error "<em>The package or bundle is not signed or it's digital signature is corrupted.</em> ". What should I do ? I sent him all the files that were generated by the Visual Studio.
  I have to mention that :</p>
  
  <ul>
  <li>I'm using Windows 8.1 </li>
  <li>I've developed the app in Visual Studio 2013 Professional </li>
  <li>The target platform of my app is Windows 8.1 (and I have no idea how to change this)</li>
  <li>My friend does not have Visual Studio installed </li>
  <li>My friend uses Windows Server 2012 Datacenter (Could
  this be the problem ? What should I do in this case ? I'm very
  interested that my app to work also on Windows 8, Windows Server 2012
  because this are the OS-es that are used at my office and by a
  majority of the people with whom I work and that could test my app
  before releasing it to the market. )</li>
  </ul>
  
  <p>EDIT : I tried to follow the steps in this article <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/jj835836(v=vs.85).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/windows/desktop/jj835836(v=vs.85).aspx</a> , but my error does not appear to be listed there.
  In AppxPackagingOM > Microsoft-Windows-AppxPackaging/Operational I have the next error:  </p>
  
  <pre><code>    error 0xC00CE014: App manifest validation error: 
      The app manifest must be valid as per schema: Line 27, Column 8, Reason: Element  
    '{http://schemas.microsoft.com/appx/2013/manifest}VisualElements' is unexpected according
     to content model of parent element '{http://schemas.microsoft.com/appx/2010/manifest}Application'.
      Expecting: {http://schemas.microsoft.com/appx/2010/manifest}VisualElements.
  </code></pre>
  
  <p>Also in AppXDeployment-Server > Microsoft-Windows-AppXDeploymentServer/Operational I have no errors.</p>