title: Unable to insert breakpoint 0 at 00401000, Win32 error 0n299
body: <p>I tried to debug a sample using WinDBG. First I removed "WinDBGSample.pdb", and then I tried to set a breakpoint at the entrance of <code>main()</code>, but I failed.</p>
  
  <p>I don't know what's wrong with my options. If you know, please give me some advice.</p>
  
  <p>The error detail:</p>
  
  <p><img src="https://i.stack.imgur.com/ghJLw.jpg" alt="error message"></p>
  
  <p>start address of <code>main()</code>:</p>
  
  <p><img src="https://i.stack.imgur.com/59wml.jpg" alt="start address"></p>