Cant help then, the notebook was designed for modern OS. The SUBSYS is HP related, doesn't matter for working audio and the generic driver works on all system based on 10EC 0236 only. Search in dedicated audio forums for a possible HDA mod driver (Not UAD)
Donations via PAYPAL / REVOLUT, if u think the guy deserves it, else to the Win-Raid community on the bottom of the page, as it deserves for all the gathered information.