Software⏱️ 3 min read📅 2026-06-19

How to Fix: Receiving ACPI error message while installing Zorin OS. What is going on here?

ACPI error message during Zorin OS installation causes pause and power button click fix.

Quick Answer: Try disabling ACPI features or updating the BIOS to resolve the issue.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 🎯 Final Words

The error message 'ACPI Error: AE_ERROR, Returned by Handler for [UserDefinedRegion] (20210331/evregion-281)' is occurring while installing Zorin OS. This issue affects users who are experiencing intermittent errors during the installation process, causing the system to pause and display this error message every 5-10 seconds. The ACPI (Advanced Configuration and Power Interface) error is related to issues with the system's power management settings.

This error can be frustrating for users as it disrupts the normal installation process, requiring them to restart the installation from scratch. However, don't worry; this issue can be resolved by following the steps outlined below.

💡 Why You Are Getting This Error

  • The ACPI error is typically caused by issues with the system's power management settings or hardware configuration. In some cases, it may also be related to conflicting device drivers or BIOS settings.
  • In some rare cases, this issue can also occur due to corrupted system files or a faulty boot loader.

🛠️ Step-by-Step Verified Fixes

Disable Power Management and Restart the Installation

  1. Step 1: Open the BIOS settings by pressing F2 (or F12) during startup. Disable the Power Management options, including any features related to Intel SpeedStep or AMD PowerTune.
  2. Step 2: Save the changes and exit the BIOS settings. Then, restart the installation process from the beginning.
  3. Step 3: Once the installation is complete, re-enable the Power Management options and save the changes.

Update BIOS and Install Zorin OS in Safe Mode

  1. Step 1: Check for any BIOS updates and install them if available. This may resolve any issues with the system's power management settings.
  2. Step 2: Restart the installation process while booting in safe mode (by pressing F8 during startup). If you don't see an option to boot in safe mode, try using a live USB drive or CD/DVD of Zorin OS and boot from it.

🎯 Final Words

By following these steps, you should be able to resolve the ACPI error message and complete the installation of Zorin OS. If the issue persists, it may be worth seeking further assistance from the Zorin OS community or a professional IT technician.

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