I think I have found a bug in oVirt 3.4.4. We just bought a new server that supports the Conroe CPU model, and I am trying to install Server 2012 R2 without luck. I keep getting error code 0x000000C4. The problem is while Windows is still to load into its pre-installation environment it cashes and then immediately resets. This is a continuous loop. I have found a way to install Server 2012 R2. Move the cluster away from the Conroe Family (in my case Penryn). Thanks for all you do.