When I launch IPython Notebook I can navigate to it and enter code. However, nothing is ever echo\'d back to the IPython Notebook interface.
I know the server is get
The return output to the notebook was being blocked by Sophos Endpoint Security and Control.
Disabling "Sophos Web Intelligence Service" in services.msc worked, but it was not ideal since it turns off my web intelligence or whatever ... I don't really want to make myself more susceptible to bad stuff...
So the solution is to:
Open your Sophos Endpoint Security and Control Panel from your tray or start menu.
Select "Configure" -> "Anti-virus" -> "Authorization" from the menu at the top.
Select the websites tab.
Click the "Add" button and add 127.0.0.1 and localhost to the "Authorized websites" list.
Restart the computer
Output works now :)