Skip to content
Home » How to Fix IRQL_NOT_LESS_OR_EQUAL BSOD Error – Windows 11/10

How to Fix IRQL_NOT_LESS_OR_EQUAL BSOD Error – Windows 11/10

  • by

IRQL_NOT_LESS_OR_EQUAL is one of the most common and frequent Blue Screen of Death (BSOD) errors on Windows 11 and 10. This error occurs when an application or service attempts to access a portion of memory that it shouldn’t access at that particular moment.

Essentially, it signifies that a kernel-mode process or driver has made an improper or unauthorized attempt to access a memory location at a higher Interrupt Request Level (IRQL).

There are various factors that can cause this error.

  1. Faulty or Outdated Drivers: In many cases, this error is caused by incompatible or outdated hardware drivers, such as graphics card drivers, network drivers, or storage drivers.
  2. Hardware Issues: Faulty hardware components, particularly RAM or hard drives, can trigger this error. Bad RAM can lead to memory access issues.
  3. Software Conflicts: Software conflicts, particularly those involving security software or drivers, can result in this error.
  4. Overclocking: Overclocking your CPU or RAM beyond their stable limits can cause instability and result in this error.
  5. Corrupted System Files: System files that have become corrupted or damaged can lead to this error. This can sometimes happen due to improper shutdowns or malware infections.
  6. IRQ Conflicts: IRQ (Interrupt Request) conflicts can also trigger this error, usually when two hardware devices are trying to use the same IRQ.

How to Fix IRQL_NOT_LESS_OR_EQUAL Error on Windows 11?

There is no one-size-fits-all solution for the IRQL_NOT_LESS_OR_EQUAL BSOD error and resolving it may require trying various methods. Since the exact cause of this error can be elusive, it’s important to remain persistent and try multiple approaches to resolve it. If one method doesn’t work, don’t be discouraged; simply move on to the next one until the problem is resolved.

   Important Notice:

Before attempting any critical fixes on your Windows OS, it’s crucial to recover and store your data in a safe place. EaseUS Data Recovery Wizard comes to the rescue for recovering data from a crashed PC.

No matter if you’re facing the dreaded blue screen of death, startup failures, or boot problems, this tool enables you to boot up your PC and recover your precious data effortlessly. So, be sure to use EaseUS Data Recovery Wizard to safeguard your files before proceeding with any fixes!

Note: Free Version allows you to recover upto 2GB Data.

Solution 1: Repair PC in Safe Boot Mode

If you’re able to boot your PC into Safe Mode, you can perform various Windows repair tasks. Safe Mode disables third-party drivers, software, and services, eliminating the possibility of software conflicts or driver malfunctions. Once your PC is in Safe Mode, you can proceed with the following troubleshooting steps.

Open PC in Safe Boot Mode
Step 2: Go to Troubleshoot

Troubleshoot in Advanced Startup Menu Windows 10 & 11

Step 3: Select Advanced options

advanced option windows 10 & 11

Step 4: Select Startup Settings


Step 5: Click on Restart button to enable safe mode.

Step 6: Once you boot your computer in Safe mode, uninstall the recently added games, drivers, and softwares.

Run SFC, CHKDSK, and DISM Command.

These three commands are essential for repairing system corruption in Windows. SFC (System File Checker) scans for and repairs corrupted files, CHKDSK (Check Disk) identifies and fixes bad sectors on the disk, and the DISM (Deployment Imaging Service and Management Tool) command is used to repair corruption in Windows system images.

SFC/Chkdsk/Dism - Step by Step
Step 1: Open Command Prompt as Administrator.

open command prompt as administrator in Windows 8, 10 & 11

Step 2: Now run the following commands one by one.
i. System File Checker tool

sfc /scannow

ii. Run Dism command

Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-Image /RestoreHealth

iii. Run Disk checking utility.

chkdsk /f c:

It will show you message:

Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)

Press Y and Press Enter. The disk checking will start on next pc start.

Uninstall recent software, drivers, and updates.

If you’ve encountered the IRQL_NOT_LESS_OR_EQUAL BSOD error after making recent changes to your PC, such as installing software, drivers, or Windows updates, consider uninstalling or removing those changes as a troubleshooting step.

Update Device Drivers

Navigate to the Device Manager and check for drivers marked with a yellow exclamation mark. Right-click on the problematic driver and choose ‘Update Driver’.

Solution 2: Remove malware/Viruses using Kaspersky Rescue Disk

If you suspect malware or a virus is causing the BSOD error, you can use Kaspersky Rescue Disk. This disk includes a bootloader and doesn’t rely on an operating system to run.

Kaspersky Rescue Disk - Step by Step

Step 1: Download the Kaspersky rescue disk from the official Kaspersky website or using the following link:

Step 2: Make a bootable USB/DVD drive using the Rufus/Win32 Disk Imager.

Step 3: Boot your PC using the Bootable USB Drive.

Step 4: Update the Antivirus database first.

Step 5: Run a System Scan and follow the instructions on your PC’s screen.

Solution 3: Run the Windows Memory Diagnostic Tool

Defective RAM can be a root cause of the IRQL_NOT_LESS_OR_EQUAL BSOD error. To check your RAM’s health, run the Memory Diagnostic Tool (mdsched.exe) to perform a memory test. If you discover that the RAM is faulty, it’s advisable to replace it with a new module.

Run Memory Diagnostic Tool

Step 1: Open the Run dialog box by pressing the Windows key + R. Type mdsched.exe and press Enter.

open memory diagnostic tool using Run Window.

Step 2: Click on “Restart now and check for problems (recommended)“.

Run memory diagnostic tool after restart.

Step 3: The memory testing process will start on reboot.

Step 4: The scan result will be displayed after login your computer. If it does not display the scan results, you can see the result in the Event Viewer app.

1. Click on the Start menu. Search for Event Viewer and open it.

2. Expand Windows Logs → System.

3. Click on the Find button and search for Memory Diagnostic.

4. You will see the Memory Diagnostic results.

Solution 4: Check for Overheating

Overheating can cause hardware instability. Make sure your computer is adequately cooled, and clean any dust from fans and heatsinks.

Solution 5: Perform System Restore

Microsoft offers the option to restore your Windows to a previous ‘last good configuration’ stage. To perform a “System Restore”, follow these steps:

System Restore - Steps by Steps
Step 1: Open the Advanced Startup Option or Windows Recovery Environment. Go to the Troubleshoot ➜ Advanced options ➜ System Restore.


Step 2: Click Next and then Select Date.

select system restore from the list

Step 3: Click on Finish to start Restoring process.

Solution 6: Repair corrupted MBR/GPT

Most of the time repairing the Master Boot Record (MBR)/GUID Partition Table (GPT) can fix the problem easily. You can repair this file as follows:

   Copy OS and data to another HDD/SSD
   Convert MBR to GPT for Windows 11 upgrade
   Convert to NTFS/FAT32
   Repair File System/Windows Startup error
   Create/Delete/Resize/Move/Format/Wipe/Extend/Merge Partition
  Create WinPE Bootable Disk

 65M Users       99% Disk Management       12K Downloads/Day       4.7 TrustPilot Rating       Windows 11/10/8/7 & Server 2022/2019/2016/2012/2008/2003    
Repair MBR using EaseUS
Step 1: Create Bootable USB drive using EaseUS. Launch EaseUS Partition Master, and click “Bootable Media” on the toolbar. Select “Create bootable media”.
Step 2: Boot your PC using Bootable USB Drive.
Step 3: Click “Toolkit” and choose “Rebuild MBR”.
easeus mbr repair
Manually Repair MBR file - Step by Step
Step 1: Boot your PC using the Windows Installation media. It will open Windows Installation Wizard. Click Next.

windows os installation

Step 2: Select Repair your computer.

repair your computer option windows 10 & 11

Step 3: It will open the Advanced Startup Option or Windows Recovery Environment. Click on the Troubleshoot.

Troubleshoot in Advanced Startup Menu Windows 10 & 11

Step 4: Select Command Prompt.

open_command_prompt in advanced startup option

Step 5: Type the following command and press Enter to execute it.
bootrec /fixmbr
bootrec /fixboot
bootrec /RebuildBcd
Step 6: Now restart your computer, and you will not see the boot time error message Bootmgr is missing.

Apart from the above solution, you also take care of following corner:

  1. Check for faulty hardware such as RAM, SSD, Graphics cards, PCI cards, etc.
  2. Update the Graphics card. Mostly it has been seen that graphics card drivers cause the issue most.
  3. Disconnect the external peripherals.


The IRQL_NOT_LESS_OR_EQUAL BSOD error can be frustrating and is caused by various factors, including driver issues, corrupted system files, faulty hardware, incompatible software, incomplete Windows updates, and improper system shutdowns. To resolve this error, you can follow the solutions outlined in this article.