Minecraft Win 10 no audio.

Hi. 
Since two days ago, my minecraft stopped making sounds. 
I reinstalled the game, reinstalled the driver, and nothing seems to work. 
Also, I suspect that happened after a windows update. But when I restored to a previous "restore point" the problem persists. 
Also, in the image attached, the minecraft is not appearing in the "volume mixer" 

Short of reinstall the Windows, itself, I dont know how to fix it, so, i'm here. 

Thanks in advance. (sorry for the english, it is my second language) 

Leo Martin.