title: How to display a non-blocking warning for the operating system in Wix?
body: <p>I already block installation of our software on operating systems where it is known not to work like this:</p>
  
  <pre><code>&lt;Condition Message="This software needs Windows XP or newer."&gt;
     &lt;![CDATA[VersionNT &gt;= 501]]&gt;
  &lt;/Condition&gt;
  </code></pre>
  
  <p>Now I would also like to <strong>display a non-blocking warning</strong> if the user tries to install the software on an operating system (VersionNT + Service Pack) that is not explicitly supported, even though it <em>might</em> work. </p>
  
  <p>For example, we only explicitly support the latest service pack of each operating system.</p>
  
  <p>How can I display such a warning?</p>