Awesome set it`s wired.
Did the drivers change get any progress?
The last step I could amend will be
BIOS update -
BIOS Version/P2.00 9/23/2015 (the current version is "
BIOS Version/P2.00, 04/09/2015")
In case this fails I`ll be forced to send you guide how to create bootable Linux live DVD in order to confirm the problem persist in different OS environment without reinstalling the Windows OS to lover version as you told me the Windows 7 was working perfectly fine.
The Linux live DVD can run the OS directly from the bootable media without installing anything on the hard drive.
We can use Ubuntu distribution because the Live dvd use multimedia drivers and codecs.
But the fact the audio problem occur only with the NVIDIA drivers installed making me think something is wrong with the last Windows 10 updates for NVIDIA or Relatek drivers.
By the way can you please confirm what partitioning you are using MBR or GPT ?
to check paste this command in relevant administrator command prompt
Post the results.
Many thanks,
Andy