Before installing the Realtek High Definition Audio Driver ... If the Windows popup "Windows can't verify the publisher of this driver software" message, press "Install this driver software ...

Before we talk about the advanced level of troubleshooting, let’s get a few things straight. First, Make sure your HDMI cable is not at fault. You can try it with another computer or another TV.

Step 1. Before installing the Realtek High Definition Audio Driver, Press the [Cancel] button if Windows detect the Multimedia Audio device. Step 2. Run the setup.exe program to start the ...

Once you’ve identified it, disable or uninstall the software. To fix any errors with Windows audio device graph isolation, update the audio drivers and disable any audio enhancements.