Audio Output Device Download For Windows 8.1

I have an older HP Pavilion DV6810us that originally came with Vista.
After 8.1 Pro install I have no sound device or recording device detected & no sound.
Under Device manager there is a ? on the Coprocessor which I believe is what controls the sound.
There is no other audio or sound device anywhere in device manager.
I have been through several nvidea & HP drivers, tried compatibility mode for Vista etc.
The motherboard is quanta 30CF
Chipset Nvidea nforce 560
Graphics Nvidea GeForce 7150M/nforce630m
I have had several driver problems with other pc's in the past and could figure them out but not this one.
I've been without sound for 2 weeks now and refuse to run Vista.
Please help, Thank you.

HIFI-CABLE driver is a virtual audio device appearing in the audio device list with a Gold Cinch Connector icon. HIFI CABLE is working like VB-CABLE except it needs to be configured with the same samplerate on its Input and Its output. HI-FI Cable is bit perfect and supports up to 24 bits 384 kHz audio stream. I plug the HDMI from my laptop to TV and before update to 8.1 it worked fine. Now I get video but no audio. Device Manager shows two things under 'Sound, Video and game controllers' 1. High Definition Audio Devide (with yellow triangle) 2. IDT High Definition Audio CODEC When I see the proper.

WindowsAudio Output Device Download For Windows 8.1Audio Output Device Download For Windows 8.1Download

Audio Output Device Free Download For Windows 8.1

  1. How to Download Realtek High Definition Audio Drivers on Windows 10, 8, 7. Method 1: Download Realtek Audio Driver from Official Realtek Website. Method 2: Download Realtek Sound Driver via Windows Device Manager. Method 3: Use Bit Driver Updater to Automatically Download Realtek Audio Drivers for Windows 10, 8, 7 (Recommended).
  2. Realtek Audio Driver for Windows 8.1 (32-bit, 64-bit) - ThinkPad S430 - Lenovo Support US. End of Development Support. This product is no longer being actively supported by development (End of Development Support) and no further software updates will be provided. Any software or support resources provided by Lenovo are made available “AS IS.