title: SQL Server 2008 R2 SP1 Database Engine Shared: The feature you are trying to use is on a network resource that is unavailable
body: <p>Previously, I had downloaded SQL Server 2008 R2 Express with Advanced Service (so that it includes SQL Server Management Studio).  Now I want to uninstall this application.  When I attempted to perform this, I received the following error:</p>
  
  <pre><code>SQL Server 2008 R2 SP1 Database Engine Shared
  
  The feature you are trying to use is on a network resource that is unavailable.
  
  Click OK to try again, or enter an alternate path to a folder containing the installation package 'sql_engine_core_shared.msi' in the box below.
  </code></pre>
  
  <p>The sql_engine_core_shared.msi cannot be found anywhere on my machine.  Does anyone have any suggestions?  Have done a lot of searching with no success.  TIA.</p>