This is an extremely odd problem, I originally thought it was a wordpress problem so I installed joomla instead and it does the same thing.
What happens is that any theme or template that is designed to be responsive is completely locked into its "mobile" version when viewed in any version of IE. Tested on 9, 10, and 11. Of course, they all work fine in Firefox. I tried completely uninstalling wordpress, joomla, and XAMPP itself. Reinstalled, left everything on all installations at the default settings, it still does it.