This is likely the Intel Management Engine Interface (MEI) or an ACPI power management device. Install the “Chipset” driver first, then the MEI driver from Acer’s support page.
If your hardware still misbehaves after driver updates, check your system's BIOS version. A BIOS update for the H81H3-AM can improve memory compatibility and system stability with modern operating systems. To help narrow down your specific situation, tell me: Acer H81h3-am Drivers
Right-click the sound icon in your taskbar and select . This is likely the Intel Management Engine Interface