Windows Setup: Python cannot open '_parent_package_path'

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Hi there!

Currently trying to setup ROS on windows 8.1 for the first time using the official MSVC SDK instructions. I've gone ahead and run all of the linked installers but when I go to make the first set of calls from the Command Prompt I receive the following error:

python: can't open file '_parent_package_path.py' : [Errno 2] No such file or directory

I've followed the very minimal install instructions to the "T" so I am pretty lost as to where this file is supposed to originate from.

If anyone can provide some insight to get me off the ground that would be greatly appreciated!