Microsoft ACPI Compliant System Driver

The Microsoft ACPI Compliant System driver helps Windows communicate with your computer’s firmware to manage power settings and recognize system resources. Supplied by Microsoft as part of Windows, it supports essential functions such as sleep, shutdown, and hardware configuration. On Windows 11, 10, 8, and 7, the correct driver depends on your Windows version and the computer’s firmware compatibility.

Key Features

• Power management support: Helps Windows coordinate supported power states, including sleep and hibernation, with the system’s ACPI firmware.
• System resource configuration: Enables Windows to use firmware information when identifying devices and managing hardware resources.
• Operating system integration: Works with Windows power-management components and other device drivers to support normal system operation.
• Built-in Microsoft support: Typically installs automatically with Windows, so a separate driver download is usually unnecessary.

How to Install

1. Check the existing device status. Open Device Manager, expand System devices, and look for Microsoft ACPI Compliant System. Open its properties to check whether Windows reports a problem. If it is working correctly, there is generally no need to reinstall it.

1. Use Windows Update first. Check for available updates through Settings or Control Panel, depending on your Windows version. Install applicable system updates and review any available driver updates. Availability varies, particularly for older Windows releases.

1. Try Device Manager’s update option. Right-click the device, select Update driver or Update Driver Software, and choose the automatic search option. Windows may confirm that the best driver is already installed.

1. Install a downloaded package only when appropriate. If you have a verified package intended for your exact Windows version and system architecture, extract it and use Browse my computer for drivers in Device Manager. Avoid forcing an incompatible driver or replacing Windows system files manually.

1. Restart and verify operation. Reboot your computer, check Device Manager again, and test normal shutdown and sleep behavior. If errors persist, consult your PC manufacturer for compatible chipset drivers or BIOS/UEFI guidance; ACPI issues can originate in firmware rather than the Microsoft driver itself.