PC Won't shut down

[LokiElixir]

So last night my PC started having some errors for some reason for my Realtek drivers disappeared from my system even though in settings and storage it says they are there and no file relating to the drivers can be found and even when I tried to reinstall them they didn't work the drivers didn't work. I didn't mind that much but as I was trying to fix that whenever I tried to go into the bios I noticed my PC wouldn't completely shut down I go to shut down etc but all my parts fans, gpu, cpu are still running so I would have to hold the power button that wakes it up for it all to shut off then I turned of the PSU and unplugged replugged it and still nothing I have thought of that should work hasn't worked so 2 things my audio drivers disappeared and my PC won't shut down properly. I'm more concerned about my PC not shutting down properly than my audio drivers

[VIVO-US]

I had a very similar problem with one of the older computers here at work.  In that case, the problem was caused by a faulty motherboard.  It's possible your motherboard is failing, and I'm not sure of a good way to fix it.  

 

The only thing I can think to try is to reset your BIOS (turn off the PSU, remove the CMOS battery and hold the power button for a minute), and then possibly run a BIOS update if one is available.