Once you get your sound back, you need to lock it in.
A red "X" appears over the volume icon in your taskbar, or your computer insists that "No audio output device is installed." acer sound drivers
Nearly every modern Acer laptop, from the budget-friendly Aspire series to the powerful Predator gaming line, uses audio hardware from . However, other specialized audio technologies are often layered on top of the base Realtek driver to enhance your listening experience. These include DTS Audio, DTS:X Ultra, and Acer Purified Voice Console . Because these technologies are highly specific to your laptop's model, the most reliable source for drivers is always Acer's official support website. Once you get your sound back, you need to lock it in
Right-click on your audio driver and select . Once you get your sound back