oVirt Driver to install Windows 2019 Server

1. Download oVirt Guest tools iso

https://resources.ovirt.org/pub/ovirt-4.3/iso/oVirt-toolsSetup/4.3-2/el7/oVirt-toolsSetup-4.3-2.el7.iso

2. Upload oVirtToolsSetup iso to your data/iso storage in the Cluster

3. Change the CD to oVirt Tools Setup

After booting the Windows installer, select the Virtual machine in the Admin portal and click ... and Change CD attach oVirt Tools Setup 4.3.2.

4. Re-attach Windows 2019 Server ISO

Attach again the windows ISO by selecting the Virtual machine in the Admin portal and click ... and Change CD attach Window Server 2019 ISO.

A good video explaining the process:

https://www.youtube.com/watch?v=m5Ud4RZI8bU&t=503s