title: ClickOnce Excel VSTO Installation Error - Access Is Denied
body: <p>I have an VSTO Excel document-based solution that I am deploying using ClickOnce to utilize automatic updates. The code is signed by our internal certificate authority which all machines on our intranet accept.  I am running into an installation error for a select few users (most users can install/update from our website that is serving the .XLSX (and related files)) with no issues but I have a few users running into the exact same error.</p>
  
  <p>We are running into the following error regardless if I set it to install from the web or a local folder after you click 'Install':</p>
  
  <pre><code>Downloading file:///C:/Users/tharvey/Desktop/OTISOppUpdatePublisher/Application Files/OTISOppUpdatePublisher - Test_1_0_5_0/libs/Telerik.WinControls.dll.deploy did not succeed.
  </code></pre>
  
  <p>Further exception details:</p>
  
  <pre><code>System.UnauthorizedAccessException: Access to the path 'C:\Users\tharvey\AppData\Local\Temp\1\Deployment\WNMBVH0B.1WD\M89GBL6B.GDM\libs\Telerik.WinControls.dll' is denied.
  </code></pre>
  
  <p>All clients are using Windows 7/Office 2010 with a typical non-admin user account.  I have had them try using an admin account, but it does not make a difference. We run into the same error. I have looked at the user's Trust Center settings in Excel and verified the install location is in the Trusted Location (in most cases, the user's desktop). </p>
  
  <p>Any ideas or have you seen this before? I have searched for this error but nothing has helped yet. What I have found is errors configuration errors with IIS and other publishing issues (which I don't think would be the case as most of our users have no issues) and as such, nothing has helped so far.</p>