ACPI BIOS Error: Why It Happens & How to Fix?

The ACPI BIOS error can occur for various reasons. This Blue Screen of Death (BSOD) bug causes your PC to crash and reboot endlessly. Do you want to know the main causes of this error and the situations under which it may occur? This article from EaseUS seeks to answer all these. We'll begin by defining the functions of ACPI and then discuss ten ways to fix the ACPI_BIOS_ERROR.

What Is ACPI & Its Basic Functions

The Advanced Configuration and Power Interface (ACPI) is an open standard created by Intel. It dictates how the operating system and computer hardware collaborate. For example, it defines how a computer should manage power and specifies communication with external devices such as printers and monitors. ACPI's basic functions include the following:

• Decide when your computer should turn on/off.
• It allows only important programs to run and blocks the non-essential ones.
• Switch to minimal power consumption mode when your battery is running low.
• Minimize the motherboard's power consumption by limiting the number of devices to activate in advance.
• Regulate clock speed based on a program's actual requirements.
• Enable hibernate mode so that your PC keeps functioning during severe power reduction.  

These are some of the common functions performed by ACPI on your computer.

Why ACPI_BIOS_ERROR Occurs in Windows

You may encounter this error on your PC due to the following reasons:

• Outdated device drivers.
• System drive conflicts after installing new hardware.
• Interference with the Windows registry database.
• A damaged hard drive.
• Poor configuration of system drivers.
• Malware or virus attack.
• A change has occurred on your computer during hibernation.

When does the ACPI error usually occur? Below are the common situations in which you may encounter this error:

• When installing Windows 10 or any other OS.
• When resuming your device following a period of hibernation.
• When launching your PC and then an ACPI.SYS BSOD file shows up.
• When running Windows 8 and 7.
• When you turn on your computer, it enters a restart loop.

Encountering this error means that you can't keep using your PC as usual. The next part discusses the possible solutions.

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How to Fix ACPI BIOS Error Windows 11/10/8/7

This section will outline ten ways to address this problem on your PC. The fixes we'll discuss include the following. Read on to get the detailed information on each fix.

Fix 1. Update The BIOS Driver

One of the leading causes of the ACPI_BIOS_ERROR is outdated drivers. You can update the BIOS driver via the following steps:

Step 1. Visit the manufacturer's website for your computer brand. Then, enter the information for your device model.

Step 2. Click on the "Driver & Utility" section.

Step 3. Select your operating system to access the list of available driver updates.

Step 4. Click on each driver update and download it to your PC. Then, proceed to install all the updates. Your BIOS driver will also comprise the installed updates.

Fix 2. Update BIOS

You can also try downloading a BIOS update if the previous method doesn't fix the problem. Check these steps:

Step 1. Open "System Information" on your PC and note your BIOS version.

Step 2. Go to your manufacturer's website and enter your computer model. Then click on "Driver & Utility."

Step 3. Click on "BIOS & FIRMWARE." Find any available BIOS update and click the "Download."

Step 4. Once done, browse to your downloads folder. Extract the downloaded update to a USB flash drive. You can then reboot your device and enter BIOS settings.

Step 5. When the BIOS window loads, click on "Tools" and select "Instant Flash" under "UEFI Update Utility." Select the file you downloaded to your flash drive and select "Update" to update your BIOS. Stay patient until the process finishes.

Fix 3. Perform System Restore

When the ACPI_BIOS_ERROR occurs, you can no longer use your system in its current state. The best fix in this scenario is to revert to an earlier restore point. This allows you to access a previous stable state of your operating system. Check these steps (you should have initially created a restore point for this method to work):

Step 1. In the search bar, type "Create a restore point" and hit Enter to open it.

Step 2. Click on "System Protection." Next, select "System Restore" and click Next.

Step 3. Choose a restore point and click Next. Click "Finish" to initiate the system restore. Stay patient as the restore process runs to completion. 

You can also use a third-party backup tool to restore your system when you experience the ACPI error. Try EaseUS Todo Backup to achieve this objective easily. This free backup software allows you to create a backup for your entire operating system and restore it whenever you experience errors. It lets you backup your OS, boot partitions, and program data for convenient recovery.

Todo Backup provides a quicker way to back up your OS than creating manual system restore points. It lets you save files to different locations for easy access. You can get started with this tool today in very simple steps.

Here is a detailed guide for Windows backup and restore:

Fix 4. Update System Drivers

System drivers enable efficient communication between the hardware components of your PC and the operating system. You may experience the ACPI error if these drivers are damaged or outdated. You can update them as follows:

Step 1. Right-click on the Start menu. Click on "Device Manager."

Step 2. Double-click any device. Right-click the drivers under it and select "Update driver."

Step 3. When asked how you would want to find the drivers, select "Search automatically. "

Step 4. Wait for the system to scan and download the latest drivers for your device. You can then proceed with installing the driver. Repeat this process for all devices for which you wish to update their drivers.

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Fix 5. Uninstall Microsoft ACPI-Compliant Driver

Some users have reported fixing the ACPI BIOS error by uninstalling this driver. You can also try it out to check whether it fixes the issue. Follow these steps:

Step 1. Right-click the Start menu. Select "Device Manager."

Step 2. Expand the "Battery" option.

Step 3. Navigate to "Microsoft ACPI-Compliant Control Method Battery" and right-click on it. Select "Uninstall device."

Step 4. Once you've uninstalled the driver, click the "Scan for hardware changes" icon. Stay patient until the scan finishes. You can then try restarting your PC.

Fix 6. Disable AHCI Mode

AHCI is an abbreviation for "Advanced Host Controller Interface." It states the mode of interaction between host controllers and storage devices (HDD/SSD) on your PC. Disabling this feature from BIOS settings could sometimes fix the ACPI error. Follow these steps:

Step 1. Reboot your computer and press the applicable keys to enter the BIOS Settings.

Step 2. Once the BIOS settings window opens, go to "Integrated Peripherals." Click on "AHCI Mode" and set it to "Disabled."

Step 3. Click "Save" then "Exit" to implement the changes made.

Fix 7. Set ACPI Mode to S1

One of the situations that may lead to the ACPI BIOS error is after waking from sleep mode. You can fix this by switching ACPI mode to S1 as follows:

Step 1. Restart your PC and enter BIOS settings.

Step 2. Navigate to "BIOS Power Settings."

Step 3. Next, move to "Advanced Power Management." Press Enter to select it.

Step 4. Navigate to "ACPI Suspend Type." Set the mode to "S1."

Fix 8. Perform Startup Repair

This fix helps to address common issues affecting the Windows startup files. It checks for possible errors and then tries to solve them. Check these steps:

Step 1. Insert a bootable USB drive into your PC and restart it. Click Next.

Step 2. Choose "Repair your computer" then "Troubleshoot."

Step 3. Go to "Advanced options" and select "Startup Repair." Then, follow the instructions to perform a startup repair for your system.

Fix 9. Change OS Image ID

The image ID usually identifies the version of the operating system currently running on your PC. Changing this ID could sometimes fix the ACPI_BIOS_ERROR. Check the following steps:

Step 1. Restart your PC and press the applicable keys to enter BIOS.

Step 2. Once on the BIOS window, click the "Advanced BIOS Features" option and select "System Component."

Step 3. Go to the "OS image ID" section and set it to "Windows."

Step 4. Save your changes and exit BIOS. You can then restart your device to check if the error has disappeared.

Fix 10. Reset Overclock Settings

Overclocking your computer may also lead to an ACPI error. You can try resetting the overclock settings to fix this issue. Check the following steps:

Step 1. Reboot your PC and enter BIOS settings.

Step 2. Navigate to the "Overclocking" section.

Step 3. Change the overclock settings to their defaults and quit BIOS. Restart your device.

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To Wrap Things Up

ACPI is responsible for communicating between your operating system and the connected hardware. The ACPI BIOS error occurs due to outdated device drivers or damaged hard drives. You may also experience it after a malware/virus attack. This tutorial has discussed different ways to fix the issue. One of them entails performing a system restore.

Try using EaseUS Todo Backup to restore your system effectively in case of the ACPI_BIOS_ERROR. This tool allows you to backup your entire system to different storage locations. If your PC experiences errors, you can then revert to your backup files. Download the tool now to get started.

FAQs on ACPI BIOS Error Loop

The common FAQs on this topic include:

1. How to Fix the BIOS in this System Is Not Fully ACPI Compliant?

You can solve the issue by setting ACPI mode to S1. Check these steps:

• Step 1. Restart your PC and enter BIOS settings.
• Step 2. Navigate to BIOS Power Settings.
• Step 3. Next, move to Advanced Power Management. Press Enter to select it.
• Step 4. Set the mode to S1. This will fix the issue.

2. Is It OK to Disable ACPI?

If you're experiencing boot failures, you can try disabling ACPI. This will help you determine whether ACPI is the cause of the problem. However, disabling this feature will deprive your PC of critical power management functions.

3. How Do I Disable ACPI in Windows 11?

You can do that by uninstalling the Microsoft ACPI-Compliant driver as follows:

• Step 1. Right-click the Start menu. Select Device Manager.
• Step 2. Double-click on the Battery option to expand it.
• Step 3. Navigate to Microsoft ACPI-Compliant Control Method Battery and right-click on it. Select Uninstall device.
• Step 4. Once you've uninstalled the driver, click on the Scan for Hardware changes icon. Stay patient until the scan finishes. You can then restart your device.

4. What Happens If I Disable ACPI?

Your computer will run without ACPI support. This will affect how your system carries out power management functions.