How to Fix IRQL_NOT_LESS_OR_EQUAL Error in Windows 10/8/7

Tracy King updated on Apr 02, 2019 to Backup and Recovery | How-to Articles

IRQL_NOT_LESS_OR_EQUAL error is a typical BSOD error in systems and it happens more frequently when Windows users try to update their systems into a new version. 
Here below, you'll see effective methods to fix this irql_not_less_or_equal error due to system update or memory crashes. 


Knowing reasons for irql_not_less_or-equal error will be very helpful for us to prevent and find relative solutions for this problem. Here below are some major reasons for this problem:

  • Incompatible device drivers
  • Poor device driver installation
  • Faulty hardware
  • Disk fragmentation
  • Registry issues
  • Viruses and malware attack

What problems will the irql_not_less_or_equal error cause to your computer? The most serious problems should be system crash, system failure and even data loss etc. So how to avoid such a problem and how to find solutions to fix it? 

Tip: Backup system and data regularly to avoid irql_not_less_or_equal error

In order to avoid unexpected system failure, crash or data loss trouble when an irql_not_less_or_equal error occurs, it's highly recommended for you to create a system backup image and backup important Windows data in advance.

If necessary, a WinPE bootable disk is also highly recommended. How to do all these things? EASY! Here we recommend you to try professional Windows backup software - EaseUS Todo Backup which allows you to free back up and restore system, data and even hard drive partition within 30 days. You can free download it here and start backup Windows data and system now.

Fix irql_not_less_or_equal error with backups.

Solutions to fix irql_not_less_or_equal error in Windows 10/8/7

Since irql_not_less_or_equal error occurs frequently on many Windows systems such as Windows 10/8 etc, here below you'll find 5 methods to fix this problem and get your computer out of BSOD problem.

Method 1. Repair Registry and Fragmented Disk

1. Press "F8" to enter the Safe Mode and select "Repair My Computer" > Enter Command Prompt in "Advanced Options" under "Troubleshoot".
2. Select "Command Prompt" and type below commands to find the root directory:

dir C:\Win* and hit Enter.
dir D:\Win* and hit Enter.
dir E:\Win* and hit Enter.

3. Type: 
cd /d C:\windows\System32\config + hit Enter.
xcopy *.* C:\RegBack\ + hit Enter.
cd RegBack + hit Enter.
dir + hit Enter;

4. Type below commands:
copy /y software ..
copy /y system ..
copy /y sam ..
And finally, click yes to finish the commands. Then reboot the computer, the registry will be manually fixed and repaired.

Method 2. Roll Back Drivers

1. Go to the Control Panel > Double click the system icon and locate the "System Properties".
2. Click hardware tab > click "Device Manager" > locate the device you recently installed and double click it;
3. Click the driver tab and the rollback driver button.

Method 3. Run Hardware Diagnostic

1. Type: Memory Diagnostic in the search and enter this tool.
2. Click "Diagnostic" your memory problems and it will ask you to perform the check by restarting PC immediately or on the next restart.
3. Scan on the memory and it will show a list of problematic errors detected during the scan.
4. Replace all faulty hardware detected in the scan and reboot PC.

Method 4. Disable Memory Caching

Press "F2" or other keys > Enter the BIOS > Disable "Memory caching feature".

Method 5. Scan and remove Malware in PC

To perform this method, you need to use some anti-virus software to scan and thoroughly remove all Malware from your PC and then reboot the computer. The unwanted irql_not_less_or_equal problem will be fixed.


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Frequently Asked Questions

Why choose EaseUS Todo Backup?

"The easiest way to protect your data and system files."techradar

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What is the difference between Clone and Backup? In what cases should I use Clone?

Clone will copy one disk to another or one partition to another (unallocated space is also supported). Usually, this option is used to upgrade the current disk by creating an identical copy. Backup will generate a .PBD image file containing the selected files or system that can be restored from the .PBD image if needed.

What is the difference between System Backup and Disk Backup?

System Backup will auto-select the system boot related partition(s) as the backup source to make sure the system image can be restored properly. Disk/Partition Backup will allow you to manually select a whole disk or speficy a certain partition as the backup source. You will get the same backup result as System Backup if you manually select the system and boot partitions with the Disk/Partition Backup option.

As a computer newbie, what features should I use to protect my computer?

You can use System Backup to back up the system and boot partitions, use Disk/Partition backup to back up the data partition and add plans to run an automatic backup. If you use the computer frequently or have software that may cause boot failure of the computer, we would suggest you back up the computer every 1 to 2 days. For other situations, you can backup the computer once a week. In addition, you can schedule File Backup to back up the files which are changed frequently.

What kind of storage service should I use to save my backup images?

EaseUS Todo Backup can save backup images to internal disks, external disks, network drives, or free cloud(Google Drive, Dropbox, and OneDrive) and CD/DVD. It is suggested to save the images to the internal/external/network drives to save time as those kinds of disks have a better read-write speed. It is suggested NOT to save the image on the source disk, because once the disk is damaged, all the files on the disk will become unavailable and you will be unable to restore the image.

As a company network administrator, what features should I use to protect our internal computers?

It is recommended that you use the SQL Backup feature to back up your company's SQL server and Exchange Backup feature to back up the Exchange server. In addition, you can execute System Backup to back up the system and boot partitions on every computer and set a plan to execute the backup once a day or twice a week to ensure that the computer can be restored timely when it has boot issues. File Backup feature can be used to back up important user data. If there are a large quantity of computers, you can purchase EaseUS Backup Center to manage the backups on the client computers centrally.

About EaseUS Todo Backup

Be it a file, system, partition, or disk, EaseUS Todo Backup will help you back up or clone the item and provide you with multiple backup plans.