Windows update overwrote your Acer driver. Fix: Roll back driver in Device Manager > Driver tab > Roll Back Driver. Then hide the bad update using wushowhide.diagcab.
Right-click the volume icon, select Sounds , then Playback , double-click your speaker, and uncheck "Allow applications to take exclusive control of this device" in the Advanced tab.
If your current driver is corrupted, clean installing it through Device Manager can resolve the issue. Right-click the and select Device Manager .
This is where the "top" experience lives. This isn't a driver in the traditional sense; it’s a .