Now about the automated installation. Generally we support silent installation of oVirt WGT.

You just need to supply /S command parameter to the installer.

However there is a catch - unfortunately Windows will popup warning messages due to the fact that the drivers supplied are non-WHQL'd. That is because the drivers are signed by Red Hat, Inc. and not by Microsoft certificate.

This is a security feature of Windows OS itself, and there is not much we can do about it right now.
The side effect of this is that you need to manually approve the drivers installation for each driver, or choose to trust all drivers from Red Hat, Inc., and then no more popups will show up. Unfortunately, you still need to do this manually at least once, and you can't pre-approve Red Hat, Inc. to make this process automated. For more information on installing oVirt WGT you can check this article: http://community.redhat.com/blog/2015/05/how-to-install-and-use-ovirts-windows-guest-tools/ by yours truly.

There is a workaround though, and it's to create a program that will automatically approve such unsigned drivers dialogs. It's relatively easy to program with i.e. AutoIt scripting engine (check: https://www.autoitscript.com/site/autoit/ ), which is free (like in free beer, but unfortunately not as in freedom because source code for it is not supplied). Note that you must be quite careful with that, as by doing so you basically disabling the security mechanism that Microsoft had put in place for a reason, and potentially you may unintentionally install other non-WHQL'd drivers - if the installation attempt for these other drivers will be made while your auto-approver program will run.