We have seem some issues related with the HDMI display and audio, so in this case what I would recommend is to install the driver that appears on the following link Intel® Download Center. It needs be installed by extracting the zip file and running the setup.exe file or by using the manual installation(through the Device Manager) method to install.
Let me know your findings.
Thank You for the reply.
I had time so I did install Windows 10 as a "fresh" version to my pc.
Now it seems that everything is working and the driver regonizes my Amplifier as it should.