Morning
I have created a Windows PowerShell script @ https://github.com/darkedges/WinVagInsAns
It installs Babun (cygwin), Virtual Box, Vagrant and Ansible, and configures them to work with all the necessary patches to ensure that you can use Vagrant to provision Virtual Machines.
It is by no means perfect, only works for clean installs, but planning to resolve those issues when I get more time.
It fixes all the gotchas I found @ http://www.darkedges.com/blog/2015/07/08/ansible-provisioing-via-vagrant-on-windows/ based on resources found via the Internet.