Starting from Windows 10 version 1607 Microsoft has tightened the Windows Drivers signing policy. In new installations of Windows 10 the Operating System might refuse to load kernel mode drivers which are not signed by Microsoft itself.
As a result Windows 10 1607 and above can refuse to install Audiomatica CLIO drivers even thought they are signed using our valid security certificates.

https://blogs.msdn.microsoft.com/windows_hardware_certification/2016/07/26/driver-signing-changes-in-windows-10-version-1607/

This is related to the BIOS Secure Boot option which is active by default in new PCs with Windows 10.

Here is an excerpt from Microsoft documentation:

“Secure Boot is a security standard developed by members of the PC industry to help make sure that your PC boots using only software that is trusted by the PC manufacturer. Support for Secure Boot was introduced in Windows 8.

When the PC starts, the firmware checks the signature of each piece of boot software, including firmware drivers (Option ROMs), EFI applications, and the operating system. If the signatures are good, the PC boots, and the firmware gives control to the operating system.”

A solution, which is also recommended by Microsoft, is to disable the Secure Boot BIOS option. We recently published a Technical Note in our Knowledge Base:

Disabling Secure Boot to Install Audiomatica CLIO Drivers

In order to run Audiomatica products it is mandatory to DISABLE SECURE BOOT.

Audiomatica always strive to provide the best products at reasonable cost.

Getting a device driver co-signed by Microsoft would definitely lead to an increase of production costs and would have a negative impact on products pricing.

Please check if your PC BIOS Secure Boot option can be deactivated.