title: Groovy Shell warning "Could not open/create prefs root node ..."
body: <p>I tried to open the Groovy Shell (<code>groovysh</code>) on Windows 8 and got the following output:</p>
  
  <pre><code>java.util.prefs.WindowsPreferences &lt;init&gt;
  WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs 
  at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
  </code></pre>
  
  <p>After printing the above message the shell started as expected.</p>