title: Upgrading from SQL Server 2008 R2 Express to SQL Server 2008 R2 Enterprise
body: <p>When I tried upgrading from SQL Server 2008 R2 Express to SQL Server 2008 R2 Enterprise, it passed all tests and then it failed at step "Select features", saying the following error:</p>
  
  <blockquote>
    <p>There are no features selected for upgrade.</p>
  </blockquote>
  
  <p>And a window error message:</p>
  
  <blockquote>
    <p>There are validation errors on this page. Click ok to close this dialog box. Review errors at the button of the setup page, then provide valid parameters or click help for more information.</p>
  </blockquote>
  
  <p>Is it possible to proceed or do I need to backup, uninstall Express and then install fresh Enterprise edition?</p>