title: batch script delete file containining certain chars
body: <p>I have almost no experience in batch, but now I need a script to delete <em>all files that contain</em> certain characters in their names from a folder <em>and its subfolders</em> on Windows 64. I only did simple things in batch like</p>
  
  <pre><code>del "C:\TEST\TEST2\*.TXT"
  </code></pre>
  
  <p>But I have no idea how to perform the filtering I need.
  Could someone help me to achieve this using batch?</p>
  
  <p><strong>EDIT</strong> more exactly, the question is "how to tell batch to include subfolders?"</p>