If you are fixing a glitch, simply updating might not work. You need to remove the old driver first.
If you have recently updated Windows and lost sound, follow these steps to resolve driver-related issues. 1. Reinstall the Audio Driver Sometimes the driver is corrupted. Open . acer sound drivers
If you cannot find your model on the Acer site, Windows can search for a generic driver. If you are fixing a glitch, simply updating might not work