[ovirt-users] How to install win-virtio Drivers (aka guest tools) silently

Hi, i am currently trying to automate an upgrade process from the "old" oVirt 4.3 Guest Tools new one which should using starting with oVirt 4.4 To achieve this I have to install the win-virtio tools quietly. This works even if I use the parameters /install /passive /norestart. But then the oVirt Guest Agent is not installed. Is there a parameter or another way to install it during a silent installation? Thanks in advance. - Tim