How To Fix Driver Irql not Less or Equal Error


Driver Irql not Less or Equal Error is a memory-related Error that often appears if a system process or a driver attempts to access a memory address without proper Access Rights.

Driver Irql not Less or Equal

The Driver Irql not Less or Equal bug checks a value of 0x000000D1. This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high.

A Software device, Hardware device, or its drivers might have caused this Error.

How To Fix Driver Irql, not Less or Equal Error?

Irql Not Less Or Equal error screen on startup.

  • Corrupt System Files.
  • Incompatible Device Drivers.
  • Faulty Hardware Items.
  • Incorrect Software Installation.
  • A downgrade to a lower version of Windows, e.g.downgrading Windows 7 to Windows Vista.

For Instance, The below image shows the “Irql Not Less Or Equal” error screen.

Driver Irql not Less or Equal

The Causes of this Error are

  1. Corrupt System Files: Error can happen with Disk write Errors, Virus Attacks, or Power Outages.
  2. In Compatible Device Drivers. This Error can be Caused by Faulty Device Driver.
  3. Faulty Hardware Drivers. This Error can be caused by a bad Ram Module or a damaged Motherboard.
  4. Incorrect Software Installation. It can be caused by MisConfigured Windows Services.
  5. A Downgraded Windows Installation. The Common cause of this error is when an older version of windows is installed on top of a newer one.

How To Fix Driver Irql, not Less or Equal Error?

There are Four types to fix Driver Irql Not Less Or Equal Error. They are

  • Disable Memory cache.
  • Install Latest Updates.
  • Clean Boot.
  • Remove Unnecessary Devices.

1. Disable Memory Cache:

To Disable The Memory cache of your Windows System, you need to enter it into your System BIOS/UEFI menu.

To Open the UEFI menu in Windows 8/8.1 follows the given steps below.

  • Start Windows and Open Charm bar by tapping Windows key+C.
  • Then Go to settings and change PC Settings.
  • Next Select the General option and click Advanced Startup and click Restart now.
  • The last step Go to Troubleshoot and Select Advanced Options.
  • Click UEFI Firmware Settings and select Restart.

Further, Follow the Below steps after Once you have entered the BIOS/UEFI menu of your system.

  • Depending on your BIOS/UEFI version, Go to the Advanced menu.
  • Next, find the Cache memory Enter and Select Disabled and press F10 to Save and Exit and Restart Your PC.

2. Install Latest Updates:

In Some cases make sure your Windows has all the latest updates installed might fix the Irql Not Less Or Equal error. Make sure the Automatic Updates option is turned On your PC.

The below steps are to show how to check the Windows Update

  • Start Windows and Open Charm bar by tapping Windows key+C, and go to settings> Change PC Settings.
  • Then click on Update and Recovery.
  • Next, choose How Updates get Installed.
  • Select Install Updates Automatically.
  • Check for recommended Updates and click Ok.

Driver Irql not Less or Equal

3. Clean Boot:

The error is caused by a present running process, then Restart your Windows System by Using the Clean boot Method.

  • Start Windows and Open Run Command by Using the Windows Key+R key.
  • Type msconfig and press Enter
  • Go to General Tab> check Selective Startup Option.
  • Uncheck the Load startup Items Check box.
  • Go to the Services tab and check to Hide all Microsoft Services checkboxes from the bottom left corner of the Windows.
  • Check Disable all, Click Ok, and Restart Windows.

To Reset these Changes and start your Windows Normally, follow the same steps:

  • Go to General Tab and check the Normal Startup Option
  • Click Ok and Restart.

Driver Irql not Less or Equal

4. Remove Unnecessary Devices:

A general fix for this error is to remove all Unnecessary Hardware Devices from your Computer and test if it boots correctly.

Remove all the Unnecessary Hardware devices like Peripherals, USB Devices, and any other devices that your computer can run without it.

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