title: Error deleting folder 'bin'. The system call level is not correct
body: <p>What does this error mean and how do I solve it?</p>
  
  <p>visual studio 2010,<br>
  windows 7,<br>
  in case it matters.  </p>
  
  <p>I tried closing and opening the solution but it still won't delete.</p>
  
  <p>Thanks!</p>