title: when and how to use windbg kernel debugging
body: <p>I found Windbg is very useful during development and debugging.
  but mostly i use windbg in use mode debugging.</p>
  
  <ol>
  <li><p>What kernel debugging can do in windbg? 
  or When should I use windbg's kernel debugging?</p></li>
  <li><p>Is there a toturial about kernel debugging in windbg?</p></li>
  </ol>
  
  <p><strong>Thanks in advance.</strong></p>