The IRQL_NOT_LESS_OR_EQUAL blue screen error is one of the most common system crashes in Windows. This issue typically appears suddenly and forces your computer to restart.
You may see a message like:
“Your PC ran into a problem and needs to restart.”
Stop Code: IRQL_NOT_LESS_OR_EQUAL
This error usually occurs when a driver or system process attempts to access restricted memory.
It commonly affects systems running:
- Windows 10
- Windows 11
In this guide, we will explain what causes the IRQL_NOT_LESS_OR_EQUAL error and how to fix it step by step.
What Causes IRQL_NOT_LESS_OR_EQUAL?
Several system issues can trigger this blue screen error.
Common causes include:
- Corrupted or outdated device drivers
- Faulty RAM (memory errors)
- Overclocked hardware
- Corrupted system files
- Malware infections
- Incompatible hardware drivers
Because this error is closely related to drivers and memory access, troubleshooting usually involves repairing drivers and system files.
Method 1: Restart Your Computer
Sometimes the error happens because of a temporary system conflict.
Restart your computer and check if the issue happens again.
If the blue screen keeps appearing, continue with the next solution.
Method 2: Update Device Drivers
Outdated or incompatible drivers are the most common cause of this error.
Steps:
- Right-click Start Menu
- Open Device Manager
- Expand device categories
- Right-click a device
- Select Update driver
Pay special attention to drivers related to:
- Graphics cards
- Network adapters
- Storage controllers
Updating drivers can often resolve system conflicts that trigger blue screens.
Method 3: Run Windows Memory Diagnostic
Because this error often involves memory access violations, checking your RAM is important.
Use the built-in tool:
- Windows Memory Diagnostic
Steps:
- Press Windows + R
- Type:
mdsched.exe
- Choose Restart now and check for problems
The system will scan your RAM for errors.
Method 4: Run System File Checker
Corrupted Windows system files can also trigger the IRQL_NOT_LESS_OR_EQUAL error.
Use the built-in repair tool:
- System File Checker
Steps:
- Open Command Prompt as Administrator
- Enter the command below:
sfc /scannow
The scan may take several minutes. Windows will automatically repair damaged system files.
Method 5: Run DISM Repair Tool
If SFC cannot repair the issue, use the Windows image repair tool:
- Deployment Image Servicing and Management
Run the following command:
DISM /Online /Cleanup-Image /RestoreHealth
This command repairs the Windows system image and resolves deeper system corruption.
Method 6: Disable Overclocking
If you have overclocked your CPU, RAM, or GPU, it can cause system instability and trigger blue screen errors.
Reset your hardware settings to default BIOS settings and check if the issue disappears.
Method 7: Scan for Malware
Malicious software can damage system files or drivers.
Run a full system scan using:
- Microsoft Defender Antivirus
Removing malware may resolve system crashes.
Related Windows Error Fix Guides
If you encounter other Windows problems, these guides may help:
• How to Fix Error 0xc000007b in Windows
• How to Fix Windows Update Error 0x8024401c
• How to Fix Windows Error 0x80004005
These tutorials cover some of the most common Windows troubleshooting issues.
Frequently Asked Questions
What does IRQL_NOT_LESS_OR_EQUAL mean?
This error occurs when a system process or driver attempts to access restricted memory.
Can faulty RAM cause this blue screen?
Yes. Memory errors are one of the most common causes of IRQL_NOT_LESS_OR_EQUAL.
Is this error serious?
It can be serious if it occurs frequently because it may indicate hardware or driver problems.
Final Thoughts
The IRQL_NOT_LESS_OR_EQUAL blue screen usually occurs due to driver conflicts, corrupted system files, or hardware issues.
Most users can fix the problem by:
- Updating device drivers
- Checking RAM using Windows Memory Diagnostic
- Repairing system files with SFC and DISM
- Disabling hardware overclocking
- Running malware scans
After applying these solutions, your system should run normally again.