Hi Claude,
Thanks for your feedback, and these are good points.
Windows, and its various versions (7, 8.1, 10) has taken 95% of the time the team has spent dedicated to resolving Vagrant installation and setup issues, and we're still not where we want to be. It's fair to say there are a lot of (sometimes quirky) variables that come into play when running a Vagrant server image a on Windows, such as the BIOS issue you've mentioned.
The software is intended for running as a service on a server, and runs very easily on Ubuntu or OS X.
We would absolutely welcome any assistance from the community of Windows users with regards to ironing out the Vagrant issues.
Brian