ok
realtek which ive linked was installed? i can guess it should
disable internet (unplug internet cable/disconnect wifi)
open device manager, and click on any device, u should see some extra icons will appear under menu (single left clicking on any device will do)
at top in menu click on Action -> Add Legacy Hardware
click Next, select second option (install hardware manually - advanced) -> Next
now scroll down until u see Sound, video and game controllers and click Next
windo will appear with two pages.
on left side under manufacturer, select Realtek and on right side select Realtek High Definition audio controller click Next, Next, Finish
now under soundcards u should see realtek HD audio which will still have code 10 (triangle with exclamation mark)
enable internet now
right click on realtek high definition audio controller and select update driver
it will search online drivers now and should install it, once its done, it will really need reboot now