The —you should never pay for it. Start with Windows Update and Device Manager. If those fail, identify your hardware via the Device ID and download directly from Realtek, Intel, NVIDIA, or your PC manufacturer.
Microsoft recommends using Windows Update first, as it often identifies and installs the correct drivers automatically. Multimedia Audio Controller Driver Windows 10 64-bit Free
When Windows 10 64-bit cannot find a compatible driver for this controller, it labels it as "Unknown Device" or displays a yellow triangle in Device Manager. The —you should never pay for it
You need to know your motherboard model. You can find this by opening the Command Prompt and typing wmic baseboard get product,Manufacturer . Multimedia Audio Controller Driver Windows 10 64-bit Free