title: System.Runtime.InteropServices.COMException when installing Github for Windows
body: <p>I'm trying to install GitHub for Windows and I get the following error message: </p>
  
  <pre><code>PLATFORM VERSION INFO
      Windows             : 6.0.6002.131072 (Win32NT)
      Common Language Runtime     : 4.0.30319.18052
      System.Deployment.dll       : 4.0.30319.17929 built by: FX45RTMREL
      clr.dll             : 4.0.30319.18052 built by: FX45RTMGDR
      dfdll.dll           : 4.0.30319.17929 built by: FX45RTMREL
      dfshim.dll          : 4.0.41209.0 (Main.041209-0000)
  
  SOURCES
      Deployment url          : http://github-windows.s3.amazonaws.com/GitHub.application
  
  ERROR SUMMARY
      Below is a summary of the errors, details of these errors are listed later in the log.
      * Activation of http://github-windows.s3.amazonaws.com/GitHub.application resulted in exception. Following failure messages were detected:
          + The referenced assembly is not installed on your system. (Exception from HRESULT: 0x800736B3)
  
  COMPONENT STORE TRANSACTION FAILURE SUMMARY
      No transaction error was detected.
  
  WARNINGS
      There were no warnings during this operation.
  
  OPERATION PROGRESS STATUS
      * [04/12/2013 08:29:27] : Activation of http://github-windows.s3.amazonaws.com/GitHub.application has started.
  
  ERROR DETAILS
      Following errors were detected during this operation.
      * [04/12/2013 08:29:27] System.Runtime.InteropServices.COMException
          - The referenced assembly is not installed on your system. (Exception from HRESULT: 0x800736B3)
          - Source: System.Deployment
          - Stack trace:
              at System.Deployment.Internal.Isolation.IStore.GetAssemblyInformation(UInt32 Flags, IDefinitionIdentity DefinitionIdentity, Guid&amp; riid)
              at System.Deployment.Internal.Isolation.Store.GetAssemblyManifest(UInt32 Flags, IDefinitionIdentity DefinitionIdentity)
              at System.Deployment.Application.ComponentStore.GetAssemblyManifest(DefinitionIdentity asmId)
              at System.Deployment.Application.ComponentStore.GetSubscriptionStateInternal(DefinitionIdentity subId)
              at System.Deployment.Application.SubscriptionStore.GetSubscriptionStateInternal(SubscriptionState subState)
              at System.Deployment.Application.SubscriptionStore.CheckAndReferenceApplication(SubscriptionState subState, DefinitionAppId appId, Int64 transactionId)
              at System.Deployment.Application.DownloadManager.DownloadDeploymentManifestDirectBypass(SubscriptionStore subStore, Uri&amp; sourceUri, TempFile&amp; tempFile, SubscriptionState&amp; subState, IDownloadNotification notification, DownloadOptions options, ServerInformation&amp; serverInformation)
              at System.Deployment.Application.DownloadManager.DownloadDeploymentManifestBypass(SubscriptionStore subStore, Uri&amp; sourceUri, TempFile&amp; tempFile, SubscriptionState&amp; subState, IDownloadNotification notification, DownloadOptions options)
              at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String&amp; errorPageUrl)
              at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)
  
  COMPONENT STORE TRANSACTION DETAILS
      No transaction information is available.
  </code></pre>
  
  <p>Does anyone understand what is causing this?</p>