title: Jupyter (iPython) notebook says "cannot find a kernel matching Python [Root]"
body: <p>I'm interested in using Jupyter notebooks with both Python 2 and Python 3 (one of my colleagues insists on still using Python 2 ;) ).</p>
  
  <p>So I diligently followed the steps listed in this excellent answer: <a href="https://stackoverflow.com/questions/30492623/using-both-python-2-x-and-python-3-x-in-ipython-notebook">Using both Python 2.x and Python 3.x in IPython Notebook</a>. </p>
  
  <p>I installed multiple kernels and now Jupyter notebooks has the option to use both Python 2 and Python 3!</p>
  
  <p>However, I managed to somehow delete the Python[Root] kernel. Now, every time I open a notebook, it comes up with an error message and makes me choose between Python 2 and Python 3 kernel.</p>
  
  <p>This is not the end of the world, but I'd like it to default to my Python[Root] kernel every time I open a new notebook. I use Anaconda by the way.</p>
  
  <p>Thanks for the assistance!</p>