title: WiX: revert permanent component to not permanent state
body: <p>I've marked a component which writes a registry key with <code>Permanent="yes"</code> attribute. Later I removed this attribute, but component still thinks it is permanent. Uninstall log says:</p>
  
  <pre><code>Disallowing uninstallation of component: {XXXXXXXX-3955-519D-AC73-F6832147D388} since another client exists
  </code></pre>
  
  <p>Searching Windows Registry for that GUID gives no result. How can I clean up "Windows Installer memory"?</p>
  
  <p>Documentation to <code>Permanent</code> attribute says</p>
  
  <pre><code>The installer registers an extra system client for the component in the Windows Installer registry settings (which basically just means that at least one product is always referencing this component)
  </code></pre>
  
  <p>but where this "extra system client" can be found and uninstalled?</p>