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The IRQL_NOT_LESS_OR_EQUAL error is a common BSOD error on systems and is more common when Windows users are trying to update their systems to a newer version.
Below are the effective methods to fix this irql_not_less_or_equal error due to system updates or memory failure.


Knowing the causes of the irql_not_less_or-equal error helps us a lot to prevent and find solutions related to this problem. Here are some of the main causes of this problem:

  • Incompatible device drivers
  • Incorrect installation of the device driver
  • Defective material
  • Disk fragmentation
  • Registration problems
  • Virus and malware attacks

What problems does irql_not_less_or_equal cause on your computer? The most serious problems should be system crash, system crash and even data loss, etc. How to avoid such a problem and find ways to solve it?

Disable memory cache

To disable the cache memory of your Windows system, you need to access your computer’s BIOS / UEFI menu.

For Windows 8 / 8.1 systems, follow these steps to open the UEFI menu:

  • Start your Windows
  • Press the Windows key and the C key to open the charms bar.
  • Click Settings
  • Go to Change PC Settings
  • Select General
  • Click Start Advanced.
  • Click Restart Now.
  • Go to troubleshooting
  • Select additional options
  • Click UEFI Firmware Settings.
  • Select reboot

After entering the BIOS / UEFI menu of your system, do the following:

  • Go to the extended menu. This menu may have a different name depending on your BIOS / UEFI version.
  • Find a cache storage option
  • Press Enter
  • Select Disabled
  • Press F10 to save changes and exit.
  • Reboot your computer

Disable the Problematic Driver

To track down the driver for the problem, you need to run Driver Verifier, an application included with Windows.

  • Click on Start
  • Enter validator in the field and press Enter.
  • Select “Create defaults”, then click “Next” and select “Automatically select all drivers installed on this computer.”
  • Click Next, then click Finish.
  • Reboot your computer and you will see a list of drivers that should be checked at startup. If a faulty driver is available, you will receive a BSOD with a corresponding error message.

Then you can identify and remove the specified driver when reconnecting to Windows.

Updated: May 2024

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Check your Memory and Hardware

Now you can try to debug your computer at the hardware level.

As mentioned in the beginning, the irql_not_less_or_equal error usually occurs when something tries to access a store for which it is not authorized.

In this case, you must first check the memory of your device. Windows has a utility that can do this for you.

  • Open a search term> type “memory diagnostics”> open the Windows Memory Diagnostic Utility.
  • In the new window, select one of the two available options. The first one immediately restarts Windows and allows the system to scan memory.
  • If it returns an error, you have an answer. Replace your computer’s memory and everything should work fine.
  • However, if the scan showed no errors, the problem lies elsewhere.

RECOMMENATION: Click here for help with Windows errors.