title: UAC promts "Unknown Publisher" on uninstall only
body: <p>I have signed my MSI installer with a valid certificate.
  When I install this MSI the UAC prompts and display the Publisher name properly.
  However, when I uninstall the MSI UAC prompts saying "Unknown Publisher".</p>
  
  <p>If checked in the <code>C:\Windows\Installer</code> folder for the cached installer and it doesn't have the certificate!</p>
  
  <p>So why doesn't it keep the certificate for the cached installer?</p>