If you see an "Unknown Device" after installing the main drivers, Windows is likely missing a specific ACPI (power management) or SMBus controller link. You can resolve this by right-clicking the unknown device, selecting , and choosing Search automatically for updated driver software to let Windows Update locate the missing micro-driver. Audio Crackling or No Sound
This guide covers finding, downloading, and installing drivers for the Acer A78-M1 motherboard (chipset A78/FM2 family). It includes key drivers to install, installation order, verification steps, and troubleshooting. acer a78-m1 motherboard drivers
Understanding the hardware helps you find compatible third-party drivers if Acer's site is missing specific legacy files: Download Acer Support Drivers and Manuals If you see an "Unknown Device" after installing