kernel Security Check Failure Error in Windows 11 (solved)

The kernel is a crucial part of the operating system that controls memory, processes, drivers, and hardware access. If, for some reason, Windows detects corruption or an inconsistency in critical kernel data structures, it cannot continue safely. To protect your data and system integrity, it forces a shutdown and shows the KERNEL_SECURITY_CHECK_FAILURE error. This Blue Screen Of Death error is typically associated with hardware issues or incompatible drivers. Again, corrupted or missing system files, Malware infections, or disk drive errors are also causes of this BSOD. In this article, you’ll learn how to troubleshoot and fix the kernel Security Check Failure Error in Windows 11.

kernel security check failure Windows 11

Microsoft describes, the Blue Screen of Death (BSOD) occurs when Windows encounters a critical error and cannot recover without rebooting. The Kernel security check failure is one type of BSOD that indicates something is wrong with the core components of your operating system, such as the kernel, drivers, or system files.

What causes the KERNEL_SECURITY_CHECK_FAILURE error?

• Corrupted system files: Critical Windows system files might be damaged, missing, or modified incorrectly. This can break kernel integrity checks and cause a BSOD.
• Faulty hardware (RAM, hard drive, graphics card): A failing hard drive, unstable RAM, or problematic graphics card can cause low-level errors that lead to kernel crashes.
• Incompatible or outdated drivers: Drivers act as the bridge between Windows and your hardware. If a driver is buggy, old, or not compatible with Windows 11, it can cause conflicts and kernel errors.
• Memory issues (bad RAM): Faulty RAM modules or unstable memory configurations can corrupt data in memory, which the kernel relies on.
• Malware or virus infections: Malware can tamper with system files, inject code into system processes, or interfere with drivers, creating conditions that trigger the error.
• Software conflicts or recent changes: Recently installed applications, tools that hook into the system (such as antivirus, VPN, or overclocking utilities), or major configuration changes can cause instability.

Depending on the cause of the Blue Screen of Death, there are different solutions you can try to fix the kernel security check failure error.

Remove External Devices and Reboot

External devices like USB drives, printers, and external hard drives can sometimes introduce conflicts that lead to BSOD errors, including the “kernel_security_check_failure.” Disconnecting them helps you rule out driver or hardware conflicts.

1. Shut down your computer completely.
2. Disconnect all external devices except your keyboard and mouse (USB drives, external HDD/SSD, printers, scanners, webcams, etc.).
3. Power on your PC and sign in to Windows 11.
4. Use your computer for a while and check if the blue screen returns.
5. If the error is gone, reconnect devices one by one, restarting and testing after each connection.
6. When the error comes back after plugging in a specific device, you’ve likely found the problematic one. Update its drivers (from Device Manager or the manufacturer’s website) or replace the device.

This simple step clears temporary glitches, reloads drivers, and can fix issues caused by problematic peripherals.

Start Windows 11 in Safe Mode

If your PC crashes too often or you can’t access the desktop normally, booting into Safe Mode is useful. Safe Mode starts Windows 11 with a minimal set of services and drivers, which helps you isolate driver or software issues.

Start Safe Mode from Windows (Shift + Restart)

1. Press Start > Power.
2. Hold the Shift key and click Restart.
3. Your PC will restart into the Windows Recovery Environment (WinRE).
4. Go to Troubleshoot > Advanced options > Startup Settings > Restart.
5. After restart, press:
   • 4 or F4 – to enable Safe Mode
   • 5 or F5 – to enable Safe Mode with Networking (internet access)

Start Safe Mode using installation media (if Windows won’t boot)

• Create or use a Windows 11 bootable USB/DVD.
• Boot your PC from the installation media.
• On the setup screen, click Repair your computer (not Install).

• Next, select Troubleshoot, then click Advanced options.

• On the advanced screen, click on Startup settings, then restart.

• And finally, click F5 to start Windows 11 safe mode, F6 to enable internet access on safe mode.

If the error doesn’t occur in Safe Mode, it’s very likely caused by a third‑party driver or software conflict, not failing hardware.

Update or Reinstall Device Drivers

Outdated, incompatible, or corrupted drivers are one of the most common reasons for Kernel Security Check Failure in Windows 11, especially after installing new hardware or a major Windows update.

Update drivers using Device Manager

1. Press Windows + X and select Device Manager.
2. In Device Manager, look for any devices with a yellow exclamation mark – these often indicate driver problems.
3. To update a driver:
   1. Right-click the device and select Update driver.
   2. Choose Search automatically for drivers.
   3. Follow the on-screen instructions.

Focus on updating critical drivers first:

• Display adapters (graphics drivers)
• Network adapters
• Storage controllers
• Audio devices

Reinstall problematic drivers

If the Kernel Security Check Failure error started after a recent driver change or you suspect a specific device:

1. In Device Manager, right-click the device and select Uninstall device.
2. Check Attempt to remove the driver for this device, if available.
3. Click Uninstall and restart your PC.
4. Windows 11 will try to reinstall the driver automatically. You can then install the latest driver from the manufacturer’s website.

Download drivers from the manufacturer

For best compatibility and performance:

• Visit your PC or laptop manufacturer’s website (Dell, HP, Lenovo, etc.) or the hardware manufacturer (NVIDIA, AMD, Intel).
• Download and install the latest drivers for Windows 11.

Alternatively, you can use a third-party tool like Driver Booster or Driver Easy to scan your system for outdated or missing drivers and automatically update them.

Repair Corrupt Windows System Files (SFC and DISM)

System files are a core part of Windows 11. If they become corrupted or go missing, it can cause serious stability issues, including the KERNEL_SECURITY_CHECK_FAILURE error. Windows includes two built-in tools to repair system files:

• System File Checker (SFC) – scans and repairs corrupted or missing system files.
• Deployment Image Servicing and Management (DISM) – repairs the Windows image and component store.

Run SFC and DISM restore health command

• Press Windows key + S and type cmd, right-click on the command prompt, select run as administrator,
• Type sfc /scannow and press Enter to run the SFC scan. This will scan and repair any corrupt or missing system files.
• Next, run the DISM command DISM /Online /Cleanup-Image /RestoreHealth (DISM is an administrator-level tool to repair Windows images)

• It may take some time, depending on system health and internet speed. Once both scans are finished, restart your computer.

If corrupted system files were causing the Kernel Security Check Failure error, this method often resolves it.

Test Your Memory (RAM) for Errors

Faulty or unstable RAM can easily cause kernel-level crashes and BSOD errors. The Windows Memory Diagnostic tool can check your memory for basic issues.

• Press the Windows key + R to open the Run dialog box, and type mdsched.exe and press Enter.
• Click on Restart now and check for problems (recommended).

• This will reboot your computer and run a memory test, results will be displayed upon restart.

• After Windows starts again, you’ll see the test results in a notification, or you can check the results in Event Viewer.

If the tool reports memory errors, one or more of your RAM modules may be faulty. You should:

• Reseat the RAM (if you’re comfortable opening your PC), or
• Test one stick at a time, or
• Replace the problematic RAM module or contact your device manufacturer for support.

Ignoring RAM errors can lead to repeated kernel crashes and data corruption, so it’s important to resolve them.

Scan Your Computer for Viruses or Malware

Malware and viruses can modify system files, inject code into processes, or interfere with drivers. This can indirectly cause the Kernel Security Check Failure error.

Use Windows Security (Defender) or another reputable antivirus solution to run a full system scan.

Scan with Windows Security (Defender)

1. Press Windows + I to open Settings.
2. Go to Privacy & security > Windows Security.
3. Click Virus & threat protection.
4. Under Current threats, click Scan options.
5. Select Full scan and click Scan now.
6. Wait for the scan to finish. If threats are found, follow the on-screen steps to remove or quarantine them.

Optionally, you can also use a dedicated anti-malware tool (such as Malwarebytes) for a second opinion. After cleaning any infections, restart your PC and monitor for BSODs.

Check for Hard Drive Issues with CHKDSK

A failing or corrupted hard drive (or SSD) can lead to read/write errors that affect critical system operations. When the kernel detects inconsistent data or file system damage, it may trigger the KERNEL_SECURITY_CHECK_FAILURE stop code.

The Check Disk (CHKDSK) utility can scan and repair file system errors and mark bad sectors on your drive.

Note: On a failing drive, CHKDSK can put additional stress on the disk. If possible, back up important data before running a full scan.

• Press Windows + S, type cmd, right-click Command Prompt and select Run as administrator.
• Type the command chkdsk C: /f /r and press Enter.
  • C: is the system drive. Replace it if Windows is installed on another partition.
  • /f tells CHKDSK to fix detected errors.
  • /r tells CHKDSK to scan for bad sectors and recover readable data.
• When prompted to schedule the scan on the next restart, type Y and press Enter.

Restart your computer. CHKDSK will run before Windows loads and may take a long time, depending on drive size and condition.

After the scan completes and Windows starts, check if the Kernel Security Check Failure error still appears.

Uninstall Problematic or Recently Installed Software

Conflicting or incompatible software can also trigger Kernel Security Check Failure in Windows 11, especially if the error started right after installing a new application, driver utility, antivirus, or system tool.

If the error started after installing specific software, consider uninstalling or updating it to eliminate conflicts.

Uninstall apps from Settings

• Press Windows + I to open Settings.
• Go to the Apps, then installed apps
• Sort the list by Install date to see newly installed programs.
• Locate any suspicious or recently installed software around the time the BSOD started.
• Click the three dots next to the app and choose Uninstall.
• Follow the prompts to remove it, then restart your PC.

Uninstall programs from the Control Panel

1. Press Windows + R, type control, and press Enter to open Control Panel.
2. Go to Programs > Programs and Features.
3. Find the application you suspect is causing conflicts.
4. Right-click it and select Uninstall.
5. Restart your PC after removal.

If uninstalling a specific app stops the BSOD, consider replacing it with a more compatible alternative.

Restore Windows 11 to a Previous State (System Restore)

If the Kernel Security Check Failure error occurred after a driver update, software installation, or system change, you can use System Restore to roll your system back to a previous working state without affecting your personal files.

Use System Restore from the desktop

• Press Windows + R, type rstrui.exe and press Enter.
• Click Next and select a restore point created before the blue screen issue began.
• Click Next > Finish and confirm. Your PC will restart and restore system settings and files.

Use System Restore from Advanced options (WinRE)

If you can’t boot normally:

• Interrupt the boot process 2–3 times (power off during the Windows logo) to force WinRE, or boot from a Windows 11 installation USB and select Repair your computer.
• Go to Troubleshoot > Advanced options > System Restore.

• Choose your account, enter your password if required, and select a restore point created before the issue started.
• Follow the on-screen instructions to complete the restoration.

System Restore can undo problematic changes without deleting personal data, though you might lose recently installed apps or drivers.

Reset Windows 11 if Nothing Else Works

If you still get the Kernel Security Check Failure BSOD after trying all the methods above, your system might be heavily corrupted. As a last resort, you can reset Windows 11.

1. Press Windows + I to open Settings.
2. Go to System > Recovery.
3. Under Recovery options, click Reset this PC.
4. Choose Keep my files to reinstall Windows 11 while keeping your personal files (apps and settings will be removed).
5. Follow the on-screen steps to complete the reset.

If the system is extremely unstable and you can’t access Settings, you can also start the reset process from WinRE (Advanced options > Troubleshoot > Reset this PC).

After the reset, reinstall drivers and apps carefully and monitor your system for stability.

Frequently Asked Questions