When you installed the video driver did you use the one from Acer or the one from Nvidia? If the one from Nvidia that is where the Nvidia audio driver came from, and from what I can see looking at the manual for that laptop it doesn't support audio over HDMI which if that is the case the audio driver shouldn't have installed.
Also if it was the one from Nvidia it should have the option to do a custom install which will give options like this (will look different if an older driver),
which you can uncheck everything but the video drive if shown.
Quote: Originally Posted by alphanumeric
I don't update drivers though windows update
As should anyone with an AMD or Nvidia video card.