title: ClickOnce deployment error - access to the path is denied
body: <p>I have a <a href="http://en.wikipedia.org/wiki/Windows_Presentation_Foundation" rel="nofollow noreferrer">WPF</a> application that I'm deploying to a network path using ClickOnce deployment. After the application is deployed to a network location, I use the ClickOnce HTML page to launch the installation process. I am successfully able to download and install the application.</p>
  
  <p>However, my users are not able to download and install the application. When a user navigates to the ClickOnce HTML page and clicks to begin the installation process, the following error message is received:</p>
  
  <hr>
  
  <pre><code>ERROR SUMMARY
          Below is a summary of the errors, details of these errors are listed later in the log.
          * Activation of http://software.mycompany.com/myapp/myapp.application resulted in exception. Following failure messages were detected:
                      + Downloading file://dev/webs/software/myapp/myapp.application did not succeed.
  
  
          * [4/5/2010 1:56:59 PM] System.Deployment.Application.DeploymentDownloadException (Unknown subtype)
                      - Downloading file://dev/Webs/software/myapp/myapp.application did not succeed.
  </code></pre>
  
  <hr>
  
  <p>All signs point to this being a security issue. So, I've done the following:</p>
  
  <ul>
  <li><p>Ensured that "Everyone" had read access to the files that were being deployed as part of my project</p></li>
  <li><p>Ensured that "Everyone" had read access to the network location where the application was deployed (//dev/webs/software/myapp)</p></li>
  <li><p>Ensured that "Everyone" had read access to the <a href="http://en.wikipedia.org/wiki/Internet_Information_Services" rel="nofollow noreferrer">IIS</a> path where the ClickOnce HTML page is located</p></li>
  </ul>
  
  <p>In each of these cases, I've made no progress in getting the application to successfully deploy via ClickOnce.</p>
  
  <p>Again, the odd thing is that I am able to successfully walk through the process of downloading and installing the application. It's my users, though, that need the ability to download and install the application.</p>
  
  <p>I've looked extensively on the web for answers, but there hasn't been much. I'd like to resolve the issue without "re-installing" or "rigging" anything.</p>