I gave 0.1.173 from the 0.1.173-2 folder a try and the installation is failing when trying to start the "virtio-win-guest-tools" service.

I tried multiple times and made sure I have administrative rights but can't get it to work.  I rebooted and tried again and that didn't help.  

The system is 2012 R2 fully patched.

Thank you for all your hard work!