Solved: IRQL GT ZERO AT SYSTEM SERVICE (0X0000004A) BSOD Crash on Windows 10/11

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Solved: IRQL_GT_ZERO_AT_SYSTEM_SERVICE (0X0000004A) BSOD Crash on Windows 10/11

The IRQL_GT_ZERO_AT_SYSTEM_SERVICE (0x0000004A) Blue Screen of Death (BSOD) is a critical error that can suddenly freeze your Windows system, often leading to data loss or corruption if not addressed. This error typically occurs when the kernel detects an illegal operation at a high Interrupt Request Level (IRQL), usually related to driver issues, hardware conflicts, or corrupted system files. If you’re experiencing this BSOD on Windows 10 or 11, follow these troubleshooting steps to resolve it effectively.

What Causes the IRQL_GT_ZERO_AT_SYSTEM_SERVICE Error?

The error can stem from several underlying issues, including:

  • Corrupted system files: Damaged or missing critical Windows components can trigger this BSOD.
  • Faulty hardware drivers
  • Overclocking or BIOS/UEFI misconfigurations
  • Malware or virus infections
  • Incompatible software or drivers
  • Hardware issues

How to Fix IRQL_GT_ZERO_AT_SYSTEM_SERVICE (0x0000004A) BSOD

Method 1: Run System File Checker and DISM

Corrupted system files are a common cause of this error. Use Windows’ built-in tools to repair them:

  • Press Win + X, then select Terminal (Admin) or Command Prompt (Admin).
  • In the command prompt, run these commands one by one and wait for each to complete: 
    DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow
  • Restart your PC after both commands finish.

Method 2: Check and Repair Disk Errors

If the issue is related to disk corruption, run CHKDSK:

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

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

  • Press Y to confirm, then restart your PC.

Method 3: Update or Reinstall Drivers

Outdated or conflicting drivers often trigger this error. Follow these steps:

  • Update drivers automatically:
    • Press Win + X, then select Device Manager.
    • Expand categories, right-click problematic devices (e.g., Display adapters), and choose Update driver.
  • Reinstall drivers manually:
    • Note the device name causing issues.
    • Uninstall it via Device Manager (right-click Uninstall device).
    • Restart your PC to trigger Windows to reinstall the driver automatically.

Method 4: Check for Malware and Virus Infections

Malware can corrupt system files. Run a full scan using:

  • Open Windows Security, go to Virus & threat protection.
  • Click Quick Scan or Full Scan and wait for results.
  • Follow on-screen instructions to quarantine or remove threats.

Method 5: Test Hardware Components

If the error persists, hardware issues may be at fault. Check:

  • RAM: Use Windows Memory Diagnostic to test for errors.
  • Hard Drive: Run manufacturer diagnostics (e.g., SSD/HDD tools).
  • Overclocking: Reset BIOS/UEFI settings to defaults if overclocked.

Method 6: Perform a Clean Boot

A clean boot helps identify software conflicts:

  • Press Win + R, type msconfig, and press Enter.
  • Go to the Services tab, check Hide all Microsoft services_, then click Disable all.
  • Go to the Startup tab, click Open Task Manager, disable all startup items, and close Task Manager.
  • Restart your PC. If no BSOD occurs, re-enable services/apps one by one to isolate the culprit.

Method 7: Restore or Reset Windows (Last Resort)

If all else fails, restore your system:

  • System Restore: Search for Create a restore point, go to System Protection_, and select System Restore.
  • Reset Windows (if needed): Go to Settings > Update & Security > Recovery > Reset this PC.

FAQ About IRQL_GT_ZERO_AT_SYSTEM_SERVICE BSOD

  • Is this error hardware or software-related?

    It can be either. Drivers, malware, or hardware (RAM/HDD) often cause it.

  • Can I prevent future crashes?

    Yes! Keep drivers updated, run regular scans, and avoid overclocking unstable settings.

  • Does this error delete my files?

    No, but unsaved work may be lost. Always back up important data regularly.

Final Notes

The IRQL_GT_ZERO_AT_SYSTEM_SERVICE (0x0000004A) error is frustrating but usually fixable with systematic troubleshooting. Start with system file repairs, driver updates, and hardware checks. If the issue persists, consider professional diagnostics for deeper hardware analysis.

Last Updated: December 13, 2025

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

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