title: Batch rename files using REN in Windows 7 (adding prefix)
body: <p>I have figured out how to edit batches of files using <code>REN</code> in Windows 7 Command Prompt.  However, this time, I am trying to add a prefix to all files but I am unable to do it. All files are tif files.</p>
  
  <p>For instance, files are located in C:\Users\user1\Desktop\Test_Folder
  <br>Files inside each folder begin with 9.
  <br>Each file has 5 digits (i.e 90200, 90201, 90202).</p>
  
  <p>I am trying to add a 0 (zero) in front of each file name and change it to 090200, 090201, 090203....</p>
  
  <p>I tried:</p>
  
  <pre><code>FOR %v IN (?????.tif) DO REN %v 0%v
  </code></pre>
  
  <p>I also tried:</p>
  
  <pre><code>FOR %%a in (*.tif) DO REN "%%a" "0%a"
  </code></pre>
  
  <p>Please help.</p>