Jupyter notebook crashes on Windows when user has a white space in their username

@Jason-DNetto reported https://github.com/swcarpentry/workshop-template/issues/467 for Software Carpentry. @Jason-DNetto said

> Two Windows users in the workshop had white spaces in their usernames and their Jupyter notebook crashed regardless of how they installed anaconda (install for all users did not solve this).

Start by reproducing the crash on Windows with a username containing whitespace, using the installation scenarios described in the linked workshop-template issue. Compare the failing and working setups and document the conditions required for the notebook to start without crashing.

Written by the indexing model from the issue text.