The Oracle VM PV Drivers for Microsoft Windows have not been signed by Microsoft for the Windows software logo program.

Because the Oracle VM PV Drivers for Microsoft Windows are not signed, Microsoft Windows does not recognize them as compatible and a security alert occurs during installation. See Section 9.1, “Security Alert for Unsigned Drivers”.

Likewise, you cannot perform silent installations or upgrades unless the Oracle VM PV Drivers for Microsoft Windows have been signed by Microsoft. The Microsoft signing process prevents pop-up windows and notifications that are required to run the installation program silently.