The IRQL_NOT_LESS_OR_EQUAL error is one of the many errors classified under the Blue Screen of Death (BSOD) errors related to the Windows OS. Blue Screen of Death errors appear when the Windows System faces a severe issue. The Windows 7/8/10 IRQL_NOT_LESS_OR_EQUAL error indicates that the computer is facing driver issues or a corrupted Windows Service trying to access a restricted memory location, which triggers unauthorized access.

Mainly, the cause is an outdated/corrupted/faulty driver on your computer. To Fix the IRQL_NOT_LESS_OR_EQUAL Error, use Safe Mode to Start the Computer, Debug the RAM, Disable the Memory Cache, or Use the Command Prompt feature to Fix Corrupted Files in the Registry.   

It leads to the suspension of activity on the PC as the current login session is terminated, and the screen turns blue with a message of the error. For most errors related to this category, it is advisable to get the error fixed as soon as possible; leaving it for prolonged periods could result in a system crash and data loss, among other things.

Why does it happen?

Some leading causes for this type of error include issues related to the device drivers, such as incompatibility and poor installation, issues with hardware and registry, and virus and malware attacks.  errors

An excellent way to ensure this error does not occur is by ensuring that the Windows System and the device drivers are correctly installed and up-to-date. Regularly performing checks for updates for the OS as well as any third-party software and backing up system files is an excellent way to accomplish this.

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How to Fix IRQL_NOT_LESS_OR_EQUAL error in Windows 10

Some of the primary ways to fix this error are explored below.

Method 1: Using Safe Mode to Start the Computer


1. At First, click on the Shift+ On-screen power button, then select“Restart” while holding down the shift key.

shift plus restart

3. Then select Troubleshoot and click on the Advanced options setting. choose advanced options

4. Afterward, click on Startup Settings and then select “Restart.”

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startup settings restart

5. The computer should reboot, after which you can select the Safe Mode option.

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Note: If after these steps you still see the IRQL_NOT_LESS_OR_EQUAL error, it indicates no issue with any third-party applications, device drivers or software but tells you that the problem originates from the computer’s hardware.

Method 2: Debugging the RAM


1. This process involves using an inbuilt utility to locate the issue within the hardware.

2. In the Search bar, type in Windows Memory Diagnostic.”

type windows memory diagnostic

3. Then open the Windows Memory Diagnostic utility.

4. This function should lead you to two options. Select the option that says Restart now and check for problems. The scan may be performed either immediately or during another restart session.

restart now and check for problems recommended

5. Performing this scan will show a list of errors in the memory or RAM, indicating the need to replace the RAM. After replacement, the computer should function normally.

Method 3: Disabling the Memory Cache

There are two ways by which this can be done:

Solution 1:


1. Use the Basic input/output system feature by clicking on the BIOS set-up keys (generally F2 in most computers but may vary from motherboard to motherboard).

2. Then locate the “Memory Settings” option and disable the “Memory caching feature”.

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Solution 2:


1. First, in the Search menu, type in Device Manager.

search for device manager

2. Click the drop-down arrow next to the Disk Drives option, and the drive’s name will appear.

disk drives

3. Afterward, double-click on the drive and go to the Policies window.

4. Select the option that disables the driver and click on OK.

disable the drive

5. Finally, Restart the computer for the changes to take effect.

Method 4: Disabling Connected Devices and Drivers


1. Unplug all devices connected to the computer, such as USB sticks, flash drives, etc. (except the mouse and keyboard).

2. Disable related or other device drivers connected to the computer.

3. Try to run the computer without installing any of these devices.

4. Enable each device individually (only one at a time) and see if the error pops up.

5. When it does, it indicates that the driver/device just enabled contains the issue and hence requires action.

6. In “Safe Mode,” uninstall the driver and reinstall it later. It should solve the error.

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Method 5: Using the Command Prompt feature to Fix Corrupted Files in the Registry


1. At First, type “Command Prompt” or “cmd” in the Cortana Search bar. Right-click Command Prompt and select Run as administratorcommand prompt run as administrator

2. Then, in the pop-up box, give the “sfc /scannow” command.

sfc scan now command prompt

3. Finally, restart the computer once the scan is complete.

Note: It is advisable to back up the registry before performing these functions.

See Also: 5 Ways to Delete System Error Memory Dump Files

Method 6: Running System Restore

IRQL_NOT_LESS_OR_EQUAL ! This method involves the creation of Restore Points before software and drivers are enabled in case of emergencies, as it allows the user to restore the system without encountering data loss.

1. At First, go to Settings and select the Update & Recovery option.

2. Then click on the Recovery located on the left side of the screen.

update and recovery

3. Afterwards, click on Refresh this PC and select the Get Started option.

4. Follow the instructions on the screen after clicking on it.

Method 7: Downloading Software

Such software is downloaded beforehand to resolve issues that may later lead to the IRQL_NOT_LESS_OR_EQUAL error. Most software requires the user to scan the PC and select the “Repair All” option to resolve the issues.

  • Total System Care is software that assists with repairing registries and fragmented disks, which are important issues to resolve.

total system care

  • ReimagePlus is another software you can download that protects the user from problems related to file storage, malware, etc.


  • 3. Downloading antivirus software is essential for removing malicious malware from the PC, which could later result in BSOD errors showing up.



Faulty or incompatible hardware drivers, incorrect memory configurations, or hardware conflicts typically cause IRQL_NOT_LESS_OR_EQUAL.


To fix IRQL_NOT_LESS_OR_EQUAL, you can update or reinstall problematic drivers, check and adjust memory settings, run hardware diagnostics, and ensure hardware components are correctly connected.

Can software conflicts trigger IRQL_NOT_LESS_OR_EQUAL?

Yes, software conflicts, such as incompatible or outdated programs, can trigger IRQL_NOT_LESS_OR_EQUAL by interfering with the system's IRQL levels or causing driver conflicts.

Can faulty hardware cause IRQL_NOT_LESS_OR_EQUAL?

Yes, faulty hardware components, such as malfunctioning RAM modules, improperly installed or incompatible devices, or overheating components, can trigger IRQL_NOT_LESS_OR_EQUAL.

Can malware or viruses cause IRQL_NOT_LESS_OR_EQUAL?

While it is less common, certain types of malware or viruses can trigger IRQL_NOT_LESS_OR_EQUAL by corrupting or interfering with critical system files or drivers.

How can I diagnose the cause of IRQL_NOT_LESS_OR_EQUAL?

To diagnose the cause of IRQL_NOT_LESS_OR_EQUAL, you can analyze the system's minidump files, use diagnostic tools to check hardware components and review system logs for any related error messages.


We hope this article furthers your understanding of the causes of the IRQL_NOT_LESS_OR_EQUAL error, how to deal with it, and ways to prevent this error from appearing in the first place.

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