On your product's support page, look for a "Drivers and Manuals" or "Downloads" section. Here, you'll be able to filter by driver category.
The sound lags behind the video on your screen. acer sound drivers
HDMI sound uses your graphics card driver (NVIDIA/Intel/AMD). Update your GPU driver, not your Realtek driver. Then set HDMI as the default playback device. On your product's support page, look for a
Enter your , SNID , or Model Number into the search box. On your product's support page
If an update is found, follow the on-screen prompts to install it, then restart your computer.