How to Fix IRQL Not Less or Equal Error in Windows 11

IRQL Not Less or Equal Error in Windows 11

The "IRQL not less or equal" error is a common issue encountered by Windows 11 users, causing system instability and unexpected crashes. This error typically occurs due to faulty hardware, outdated drivers, or incompatible software. Before delving into solutions, it's essential to understand why this error occurs. This error can occur due to several reasons, including:

• Faulty Hardware: Issues with hardware components such as RAM, hard drive, or peripheral devices can trigger this error.

• Outdated or Incompatible Drivers: Drivers that are outdated, incompatible, or improperly installed can cause conflicts and lead to the IRQL error.

• Corrupted System Files: Corruption in system files or registry entries can also contribute to this error.

Now, let's explore each potential cause in more detail and discuss troubleshooting steps to resolve the issue effectively.

Common Causes and Solutions of IRQL Not Less or Equal Error in Windows 11

1. Faulty Hardware:

Cause: Hardware components such as RAM modules or hard drives may be faulty or malfunctioning, leading to the IRQL error.

Solution:

• Run Hardware Diagnostics: Use built-in hardware diagnostic tools or third-party software to test your RAM, hard drive, and other hardware components for errors.

• Check Connections: Ensure all hardware components are properly connected to your computer and there are no loose connections.

• Replace Faulty Hardware: If hardware tests reveal any issues, consider replacing the faulty component to resolve the error.

2. Outdated or Incompatible Drivers:

Cause: Drivers that are outdated, incompatible, or improperly installed can cause conflicts and trigger the IRQL error.

Solution:

• Update Drivers: Use Windows Update or visit the manufacturer's website to download and install the latest drivers for your hardware components, including graphics card, network adapter, and chipset drivers.

• Uninstall Problematic Drivers: If you suspect a specific driver is causing the error, uninstall it through Device Manager and then reinstall the latest version.

• Use Driver Update Software: Consider using third-party driver update software to automatically scan for and update outdated drivers on your system.

3. Corrupted System Files:

Cause: Corruption in system files or registry entries can lead to the IRQL error.

Solution:

• Run System File Checker (SFC) Scan: Open Command Prompt as an administrator and run the "sfc /scannow" command to scan for and repair corrupted system files.

• Use DISM Tool: If the SFC scan doesn't resolve the issue, run the Deployment Image Servicing and Management (DISM) tool with the "DISM /Online /Cleanup-Image /RestoreHealth" command to repair the Windows image.

• Perform System Restore: If the error started occurring recently, consider performing a system restore to revert your system to a previous state before the error occurred.

4. BIOS/UEFI Settings:

Cause: Incorrect BIOS or UEFI settings can sometimes lead to the IRQL error.

Solution:

• Update BIOS/UEFI Firmware: Visit your motherboard manufacturer's website and download the latest BIOS or UEFI firmware for your system. Follow the manufacturer's instructions to update the firmware.

• Reset BIOS Settings: If you're experiencing the error after making changes to BIOS settings, try resetting the BIOS to its default settings and then reconfiguring them as needed.

5. Software Conflicts:

Cause: Incompatible or poorly coded software can cause conflicts and trigger the IRQL error.

Solution:

• Uninstall Recently Installed Software: If the error started occurring after installing new software, consider uninstalling it to see if the error resolves.

• Use Compatibility Mode: For older software that may not be fully compatible with Windows 11, try running it in compatibility mode.

Conclusion

Encountering the "IRQL not less or equal" error on Windows 11 can be frustrating, but with the troubleshooting steps outlined in this guide, you can effectively diagnose and resolve the issue. By addressing hardware issues, updating drivers, repairing system files, and ensuring compatibility, you can optimize your Windows 11 experience and minimize the occurrence of this error. If you continue to experience problems despite trying these solutions, consider seeking assistance from a professional technician to diagnose and address any underlying issues with your system.