Hi evrybody! First of all sorry for my language. On windows machines despite the installation of oVirt Guest Tools4.2-4.el7 a warning is issued as in Title. My solucion: a) ovirt-engin DB update vdc_options set option_value='ovirt-guest-agent-common,ovirt-guest-agent,oVirtGuestTools' where option_name='AgentAppName'; b) windows VM Change DisplayName registry: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\oVirtGuestTools to oVirtGuestTools-4.2-4.el7. Restart OVirt Guest service