Solved: IRQL NOT GREATER OR EQUAL (0X00000009) BSOD Crash on Windows 10/11

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Solved: IRQL NOT GREATER OR EQUAL (0X00000009) BSOD Crash on Windows 10/11

The **IRQL_NOT_GREATER_OR_EQUAL (0x00000009)** Blue Screen of Death (BSOD) is a critical system error that can suddenly crash your Windows 10 or 11 PC, often without warning. This error typically occurs when the kernel tries to execute an operation at a lower IRQL (Interrupt Request Level) than required, leading to a system halt. While frustrating, this issue is usually fixable with the right troubleshooting steps. Below, well explain what causes it and how to resolve it effectively.

What Causes the IRQL_NOT_GREATER_OR_EQUAL Error?

The error can be triggered by several factors, including:

  • Corrupt system files: Damaged or missing Windows components may interfere with kernel operations.
  • Faulty hardware drivers
  • Overclocking or BIOS/UEFI misconfigurations
  • Malware or virus infections
  • Incompatible software or driver updates
  • Hardware issues (RAM, graphics card, or storage)

How to Fix IRQL_NOT_GREATER_OR_EQUAL (0X00000009) BSOD

### **Method 1: Run System File Checker and DISM**

A corrupted system file can trigger this error. Use Windows built-in tools to repair critical files:

  • Press **Win + X** and select **Terminal (Admin)** or open Command Prompt as Administrator.
  • Run the following commands one by one, pressing Enter after each: 
    DISM /Online /Cleanup-Image /RestoreHealth
    sfc /scannow
  • Restart your PC and check if the issue persists.

### **Method 2: Update or Reinstall Problematic Drivers**

Outdated or conflicting drivers (especially graphics, chipset, or storage) often cause this error. Heres how to update them:

  • Press **Win + X** and select **Device Manager**.
  • Expand categories like **Display adapters**, **Storage controllers**, or **System devices**.
  • Right-click any device with a yellow exclamation mark, then choose **Update driver** > **Search automatically for drivers**.
  • If no updates are found, use the manufacturers website (e.g., NVIDIA, AMD, Intel) to download the latest driver.

### **Method 3: Check for Malware and Run a Full Scan**

Malware can corrupt system files or interfere with kernel operations. Use Windows Defender or trusted antivirus software to scan your PC.

  • Open **Windows Security** > **Virus & threat protection**.
  • Click **Quick scan**, then **Scan options** and select **Full scan**.
  • Follow the prompts to remove any threats.

### **Method 4: Test RAM for Errors**

Faulty RAM can trigger this BSOD. Use Windows built-in tool:

  • Press **Win + R**, type mdsched.exe, and hit Enter to open Memory Diagnostic.
  • Select **Restart now and check for problems**.
  • Follow the on-screen instructions. If errors are found, replace your RAM or test each stick individually.

### **Method 5: Check Disk Health with CHKDSK**

A failing hard drive can cause kernel-level crashes. Run CHKDSK to scan and repair disk issues:

  • Open Command Prompt as Administrator.
  • Type: 
    chkdsk C: /f /r

    (Replace **C:** with your system drive if needed.)

  • Press Enter, then restart when prompted. The scan runs on the next boot.

### **Method 6: Roll Back or Disable Problematic Updates**

If the error started after a Windows update, roll back the latest updates:

  • Go to **Settings** > **Windows Update** > **Update history**.
  • Click **Uninstall updates**, select the most recent ones, and click **Uninstall**.

### **Method 7: Check for Overclocking or BIOS Issues**

If youve overclocked your CPU/GPU or modified BIOS settings, reset them to default in BIOS/UEFI. Consult your motherboard manual for instructions.

Prevent Future IRQL Errors

To avoid recurring BSODs:

  • Keep Windows and drivers updated.
  • Avoid third-party overclocking tools unless necessary.
  • Use reliable antivirus software.
  • Monitor system health with tools like System Configuration to check startup items.
  • Regularly run sfc /scannow and DISM for maintenance.

FAQ About IRQL_NOT_GREATER_OR_EQUAL (0X00000009)

  • Is this error hardware or software-related?
    It can be either. Hardware issues (RAM, GPU) often cause it, but corrupt files or drivers are common culprits.
  • Will a clean install fix it permanently?
    A clean install resets system files, but if the issue is hardware-related (e.g., RAM), it may return. Test hardware after reinstalling.
  • Can I recover data before troubleshooting?
    Yes, but avoid forcing a shutdown during BSODs to prevent data corruption. Use File History or a recovery tool if needed.
  • Why does this happen on high-end PCs?
    High-performance systems (gaming rigs, workstations) are more prone to driver conflicts or overclocking-related crashes. Ensure all components are stable and drivers are up-to-date.

Final Notes

The IRQL_NOT_GREATER_OR_EQUAL error is usually resolvable with systematic troubleshooting. Start with system file repairs, driver updates, and hardware checks. If the problem persists, consider professional diagnostics for deeper hardware issues. For advanced users, checking Microsofts technical documentation may provide additional insights.

If youve successfully fixed this error, share your solution in the comments to help others! For further assistance, visit Windows Support or seek expert help if needed.

Last Updated: December 13, 2025

Tested on: Windows 10 (22H2) & Windows 11 (23H2)

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