Audio problem with v15 nitro

Hi, i'm on this forum (AGAIN) because i have an annoying problem.
Sometimes my soundcard randomly stops working, i get a red cross on the speaker symbol and an error sayng something like "No audio output devices installed". It looks like it fixes itself aver a FULL shutdown, but when i have this problem the pc cannot even shut down completely, it freezes after the shutdown procedure with a black screen and the coling fans at max speed, and i have to force it keeping the button pressed.
The last time this happened i also got a bsd at the first boot sayng System Service Exception related to rtkvhd64.sys.
I already tryed to restore, I removed and reinstalled every single driver, nothing works. Once o twice per day i loose my sound card and i have to make a full restart shutting down the pc in the brutal way.

I'm starting getting tired of this pc, i already changed it TWICE for problems with the trackpad, i bought another one in another shop that doesn't have any issues with the touchpad but now i have this problem that is even worse.

Personally, wether or not i will fix this problem, i will never EVER buy another acer pc. I'm running to / from the shop with this thing for 3 weeks now, how can Acer put together a 1200 euros laptop this way?