title: Can not create a "notebook" using ipython Notebook
body: <p>I have recently installed ipython using Enthought's EPD python install - and when starting the iPython HTML notebook from the command prompt by typing:</p>
  
  <pre><code>ipython notebook --pylab=inline
  </code></pre>
  
  <p>I manage to get the localhost browser notebook screen pop up correctly.</p>
  
  <p>However when I try to create a new notebook by clicking "New Notebook" I get the following error message:</p>
  
  <p>"Creating Notebook Failed The error was: Unexpected error while autosaving notebook: C:\Windows\System32\Untitled0.ipynb [Errno 17] No usable temporary file name found"</p>
  
  <p>I am assuming this i sbecause I may not have write privilege for that particular drive. So I have tried to go into the "ipython_notebook_config.py" file and change the following:</p>
  
  <pre><code># The directory to use for notebooks and kernels.
  c.NotebookApp.notebook_dir = u'C:\Users\Stuart\Documents\iPython' 
  </code></pre>
  
  <p>and</p>
  
  <pre><code>c.FileNotebookManager.notebook_dir = u'C:\Users\Stuart\Documents\iPython'
  </code></pre>
  
  <p>I have then closed down all the cmd windows and started the ipython notebook agaion. But when I click on "New Notebook" I get the same error message as before:</p>
  
  <p>"Creating Notebook Failed The error was: Unexpected error while autosaving notebook: C:\Windows\System32\Untitled0.ipynb [Errno 17] No usable temporary file name found"</p>
  
  <p>Could someone please help me as to how I can get this working? Any help very much appreciated.</p>