coffee break 23 (my PC 4)

Recently, the condition of the PC is not good. 

 

Useing for about 30 minutes, the sound is cut off and can not be heard.

 
At the same time, an error "kp41" was also generated.
That could be counteracted by removing the usb device.  

However, I still do not know the cause of the sound loss. 

(1) driver (realtek HD audio) 

(2) motherboard hardware error 

(3) win10 (upgrade  patches)

????