How to Fix ACPI.sys Failed Error on Windows 10

Jul. 06, 2025 / Updated by Seraphina to Windows 10

fix-acpi-sys-failed-error-windows-10

While using Windows 10, some users may encounter a Blue Screen of Death (BSOD) that includes the error ACPI.sys. This issue is usually related to power management, driver conflicts, or hardware compatibility problems.

If not addressed in time, it can lead to frequent crashes and severely affect system usability. This article explains what the ACPI.sys error means and provides effective solutions to help restore system stability.

1. What Is ACPI.sys?

ACPI.sys stands for Advanced Configuration and Power Interface Driver. It is a critical system file in Windows responsible for managing power settings, such as sleep, hibernation, and battery management. It's one of the core components ensuring stable system operation.

2. Common Symptoms of ACPI.sys Errors

Blue screen appears during Windows startup with an ACPI.sys message
Unexpected BSOD and automatic restart during usage
Crashes occur when the system enters or wakes from sleep mode
Failure to boot into desktop after driver or update installation
Error codes such as: DRIVER_IRQL_NOT_LESS_OR_EQUAL, SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (ACPI.sys)

3. Common Causes of ACPI.sys Errors

Driver conflicts, especially chipset or GPU-related drivers.
Failed system updates that lead to file corruption or incompatibility.
Incorrect BIOS settings, such as ACPI mode disabled or incompatible configurations.
Hardware compatibility issues, such as newly installed components incompatible with the motherboard.
Faulty memory or hard drive, causing system file access errors that crash ACPI.sys.

4. How to Fix ACPI.sys Errors on Windows 10

Fix 1: Check and Update Device Drivers

Outdated or incompatible drivers are one of the most common causes of ACPI.sys errors. If you're not familiar with manual driver updates, it's recommended to use Driver Talent, which automatically detects and updates drivers to avoid mistakes.

Download Driver Talent

Download and install the latest version of Driver Talent.
Open the program and click "Scan".
Identify the outdated or missing drivers from the list, then click "Update".

driver-update

Restart your PC to apply the updated drivers.

Fix 2: Boot into Safe Mode for Troubleshooting

Restart your computer and repeatedly press F8, Shift + F8, or F11 depending on your device.

Select Troubleshoot > Advanced Options > Startup Settings > Restart.

click-startup-settings

After reboot, press 4 or F4 to enter "Safe Mode".

In Safe Mode, update or uninstall problematic drivers or restore settings.

Fix 3: Repair System Files

Search for cmd in the taskbar, right-click Command Prompt, and choose "Run as administrator".

Type the following command and press Enter: sfc /scannow

repair-system-files

Wait for the scan to complete, then restart your computer.

Fix 4: Update BIOS Firmware

Outdated BIOS versions can cause ACPI.sys errors due to incompatibility with Windows 10.

Important:

Visit your motherboard manufacturer's website to find the correct BIOS update.

Read the instructions carefully and follow the official guide.

BIOS updates can be risky—be sure to back up your data or consult a technician beforehand.

Fix 5: Use System Restore or Reset

System Restore:

If the ACPI.sys error appeared after a recent update, driver, or software installation:

Open Control Panel > Recovery > Open System Restore.

open-system-restore

Choose a restore point dated before the error occurred.

System Reset:

Go to Settings > Update & Security > Recovery.

Under "Reset this PC", click "Get Started".

Choose to keep your files or remove everything to reinstall Windows.

5. Tips to Prevent ACPI.sys Errors

Regularly back up your system and important data.
Install drivers from official sources like Driver Talent or manufacturer websites.
Avoid changing BIOS settings or overclocking unless necessary.
Create a restore point before major Windows updates.
Don't use third-party optimization tools to modify power management settings.

6. Frequently Asked Questions (FAQ)

Q1: What if I can't access Windows due to ACPI.sys error?

A: Try booting into Safe Mode or use a Windows 10 installation disk to enter the recovery environment.

Q2: Can I disable the ACPI.sys file?

A: No, disabling ACPI.sys is not recommended. It's a core power management driver and disabling it may cause further system issues.

Q3: What if updating drivers doesn't fix the problem?

A: Try updating the BIOS or performing a system restore. If the issue persists, it may be a hardware fault and you should consider professional repair services.