KERNEL_SECURITY_CHECK_FAILURE is a Windows stop error, commonly known as a Blue Screen of Death (BSOD). Its official bug check code is:

0x00000139

Microsoft defines bug check 0x139 as a condition in which the Windows kernel detects corruption of a critical data structure. Because continuing to operate with corrupted kernel data could compromise system stability or security, Windows deliberately stops the operating system.

A typical screen may display:

Your device ran into a problem and needs to restart.

Stop code: KERNEL_SECURITY_CHECK_FAILURE

On newer Windows 11 versions, the appearance of the stop-error screen may differ from the traditional blue screen, but the underlying bug-check mechanism is the same.

This error should not automatically be interpreted as a security breach or malware infection. The word "security" refers primarily to Windows detecting an unsafe or corrupted kernel condition.

What Does Bug Check 0x139 Actually Mean?

Windows operates critical parts of the operating system in kernel mode. Device drivers, memory management components and other low-level services interact with kernel data structures.

If Windows detects that one of these protected structures has become corrupted or an invalid operation has occurred, it can issue:

KERNEL_SECURITY_CHECK_FAILURE (0x139)

Microsoft documents several possible corruption categories. Examples include:

• Stack-based buffer overruns
• Corrupted LIST_ENTRY structures
• Invalid parameters
• Illegal array indexing
• Invalid control transfers
• Invalid memory writes
• Invalid register or fiber contexts
• Invalid object reference counts
• Unsafe modification of read-only data
• Corrupted balanced-tree entries
• Other memory-safety violations

The exact category can often be identified from Parameter 1 of the 0x139 bug check.

Therefore, KERNEL_SECURITY_CHECK_FAILURE is not one specific fault. It is a category of serious kernel integrity failures.

Common Causes of KERNEL_SECURITY_CHECK_FAILURE

1. Faulty or Incompatible Device Drivers

Drivers are among the first components to investigate.

Problematic drivers may include:

• Graphics/GPU drivers
• Wi-Fi drivers
• Ethernet drivers
• Bluetooth drivers
• Storage/NVMe drivers
• Chipset drivers
• USB drivers
• Printer drivers
• Audio drivers
• VPN drivers
• Antivirus/security filter drivers
• Virtualization drivers

A driver can corrupt memory and Windows may detect the damage later, which means the driver executing at the exact moment of the crash is not necessarily the component that originally caused the corruption.

2. Recently Updated Drivers

If the problem began immediately after updating a driver, the new driver may be incompatible with the computer or Windows build.

Pay particular attention to recently updated:

• NVIDIA graphics drivers
• AMD graphics drivers
• Intel graphics/chipset drivers
• Network drivers
• Storage drivers

Consider rolling back the recently changed driver.

3. Defective or Unstable RAM

Memory corruption can also originate from physical memory.

Possible RAM-related causes include:

• Defective RAM
• Poorly seated memory
• Incompatible memory modules
• Incorrect memory timings
• Unstable XMP/EXPO configuration
• Aggressive RAM overclocking
• Mixing incompatible memory kits

If BSOD codes change randomly between crashes, hardware or memory instability becomes especially important to investigate.

4. Corrupted Windows System Files

Damaged Windows components can contribute to system instability.

Corruption can result from:

• Unexpected shutdowns
• Failed Windows updates
• Storage errors
• Malware
• Disk corruption
• Interrupted servicing operations

Windows includes DISM and System File Checker tools that can repair many operating-system component problems.

5. GPU Driver Problems

If KERNEL_SECURITY_CHECK_FAILURE occurs during:

• Gaming
• Video rendering
• GPU-intensive applications
• Starting a game
• Waking from sleep
• Connecting an external monitor

the graphics driver becomes a strong troubleshooting candidate.

Do not assume the graphics card itself is defective before investigating its driver.

6. Overclocking, XMP or EXPO Instability

An apparently stable overclock can still produce intermittent memory corruption.

Temporarily return the system to manufacturer/default settings by disabling:

• CPU overclocking
• GPU overclocking
• RAM overclocking
• XMP
• EXPO
• Custom memory timings
• Undervolting

Then test the system again.

7. BIOS/UEFI Problems

Outdated firmware or incorrect firmware configuration can occasionally contribute to instability, particularly after:

• CPU upgrades
• RAM upgrades
• Windows upgrades
• Motherboard changes
• New GPU installation

Check the computer or motherboard manufacturer's support page for applicable BIOS/UEFI updates.

Important: BIOS updates should be performed carefully. An interrupted or incorrect firmware update can prevent the computer from booting.

8. Third-Party Antivirus or Security Software

Security software often operates deeply within Windows.

Kernel-level components used by:

• Antivirus programs
• Endpoint security
• Anti-cheat systems
• VPN software
• Encryption software
• Firewall software

can potentially participate in driver conflicts.

If crashes began after installing such software, investigate it as part of troubleshooting.

9. Storage Problems

SSD or HDD problems can indirectly result in corrupted drivers, system files or paging data.

Possible symptoms include:

• Disk errors in Event Viewer
• Slow boot
• File corruption
• Applications freezing
• SMART warnings
• Multiple unrelated BSOD codes

Storage health should therefore be checked if the basic driver and memory tests do not reveal the cause.

How to Fix KERNEL_SECURITY_CHECK_FAILURE

The following steps are arranged from relatively safe/basic troubleshooting toward more advanced diagnostics.

Step 1: Restart the Computer

If the error occurred only once, restart the computer and observe it.

A single BSOD does not necessarily indicate permanent hardware failure.

However, repeated KERNEL_SECURITY_CHECK_FAILURE crashes should be investigated.

Step 2: Identify What Changed

Ask:

What changed immediately before the first BSOD?

Check whether you recently:

• Installed Windows updates
• Updated a driver
• Installed a graphics driver
• Installed antivirus software
• Installed a VPN
• Added RAM
• Installed a new SSD
• Installed a graphics card
• Changed BIOS settings
• Enabled XMP/EXPO
• Overclocked the system
• Installed low-level hardware utilities

Microsoft specifically recommends considering recently added hardware, drivers and system services when investigating bug check 0x139.

Reversing the most recent relevant change can sometimes identify the cause quickly.

Step 3: Check Device Manager

Press:

Windows + X → Device Manager

Look for devices displaying:

• Yellow warning icons
• Unknown Device
• Driver errors
• Disabled devices

Pay special attention to:

• Display adapters
• Network adapters
• Storage controllers
• Sound devices
• Bluetooth
• USB controllers

Microsoft also recommends checking Device Manager when troubleshooting recurring Windows stop errors.

Step 4: Update Important Drivers

Download drivers from your computer, motherboard, GPU or hardware manufacturer's official support site when possible.

Priority drivers include:

1. Chipset
2. Storage/NVMe
3. Graphics
4. Ethernet
5. Wi-Fi
6. Bluetooth
7. Audio

Avoid randomly installing drivers from unknown third-party driver-download websites.

Step 5: Roll Back a Recently Updated Driver

If crashes began immediately after a driver update:

Device Manager → Device → Properties → Driver → Roll Back Driver

Restart Windows afterward.

If Roll Back Driver is unavailable, uninstalling the problematic driver and installing a known stable manufacturer-provided version may be appropriate.

Step 6: Install Windows Updates

Open:

Settings → Windows Update → Check for updates

Install applicable Windows updates and restart the computer.

Microsoft includes Windows Update among its standard troubleshooting recommendations for recurring stop-code errors.

Step 7: Run System File Checker

Open Command Prompt or Windows Terminal as Administrator.

Run:

sfc /scannow

Allow the scan to reach 100%.

Possible results include:

Windows Resource Protection did not find any integrity violations.

or:

Windows Resource Protection found corrupt files and successfully repaired them.

Restart Windows after repairs.

Step 8: Repair the Windows Component Store with DISM

Open an elevated Command Prompt and execute:

DISM /Online /Cleanup-Image /ScanHealth

Then:

DISM /Online /Cleanup-Image /RestoreHealth

After DISM finishes, run:

sfc /scannow

again.

A practical repair sequence is therefore:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Restart the computer afterward.

Step 9: Test the RAM

Windows includes the Windows Memory Diagnostic utility.

Press:

Windows + R

Type:

mdsched.exe

Select:

Restart now and check for problems

The computer will restart and test the memory.

Microsoft recommends Windows Memory Diagnostic as one of its advanced troubleshooting steps for recurring stop errors.

For intermittent problems, technicians may also use more extensive third-party bootable memory-testing utilities.

Step 10: Reseat the RAM

For a desktop computer, if you are comfortable servicing hardware:

1. Shut down Windows.
2. Disconnect power.
3. Follow appropriate ESD precautions.
4. Remove the RAM modules.
5. Inspect the modules and slots.
6. Reinstall them firmly.
7. Test the computer.

If multiple RAM modules are installed, individual-module testing may help identify a defective DIMM.

Do not perform internal hardware servicing if it could violate warranty terms or if you are unfamiliar with safe hardware handling.

Step 11: Disable XMP/EXPO and Overclocking Temporarily

Enter BIOS/UEFI and restore default memory/CPU settings.

Temporarily disable:

• Intel XMP
• AMD EXPO
• CPU overclock
• GPU overclock
• Memory overclock
• Custom voltage settings

If the BSOD disappears afterward, investigate hardware stability rather than Windows itself.

Step 12: Check the System Drive

Run:

chkdsk C: /scan

This performs an online scan.

If Windows reports errors requiring offline repair, a technician may use:

chkdsk C: /f

Windows may request that the scan be scheduled for the next restart.

Before performing extensive disk repairs, ensure important data is backed up.

Step 13: Check Event Viewer

Press:

Windows + X → Event Viewer

Navigate to:

Windows Logs → System

Check events around the exact time of the crash.

Look for errors involving:

• Disk
• NTFS
• WHEA
• Display drivers
• Storage controllers
• Device drivers
• Unexpected shutdowns
• Hardware failures

Microsoft specifically recommends reviewing System events occurring around the time of the 0x139 crash.

Do not assume every Event Viewer error caused the BSOD. Many events simply record consequences of the unexpected shutdown.

Step 14: Boot Windows in Safe Mode

If Windows crashes repeatedly during normal startup, try Safe Mode.

Safe Mode loads Windows with a reduced set of drivers and services.

If the computer remains stable in Safe Mode but crashes during normal operation, this increases suspicion of:

• Third-party drivers
• Startup applications
• Security software
• Background services
• Hardware-management utilities

Microsoft recommends Safe Mode when recurring stop errors interfere with normal Windows startup.

Step 15: Perform a Clean Boot

A clean boot can help isolate third-party software conflicts.

Open:

msconfig

Under Services:

1. Select Hide all Microsoft services.
2. Disable remaining non-Microsoft services for diagnostic testing.

Also disable unnecessary startup applications through Task Manager.

Restart and test.

If the BSOD stops, re-enable items gradually until the problematic software or service is identified.

Step 16: Check the Windows Minidump

For recurring BSODs, dump analysis is considerably more useful than repeatedly trying generic fixes.

Windows commonly stores small crash dumps in:

C:\Windows\Minidump\

You may find files similar to:

082926-14562-01.dmp

A larger dump may also exist at:

C:\Windows\MEMORY.DMP

Microsoft notes that examining multiple dumps can help determine whether repeated 0x139 crashes share the same characteristics.

How to Enable Minidump Creation

Press:

Windows + R

Enter:

sysdm.cpl

Go to:

Advanced → Startup and Recovery → Settings

Under Write debugging information, select:

Small memory dump (256 KB)

The directory is normally:

%SystemRoot%\Minidump

Now future crashes should generate diagnostic information, assuming Windows can successfully write the dump.

Advanced Diagnosis Using WinDbg

IT professionals can analyze .dmp files using Microsoft's Windows debugger.

Open the dump in WinDbg and run:

!analyze -v

Useful output may include fields such as:

BUGCHECK_CODE
MODULE_NAME
IMAGE_NAME
FAILURE_BUCKET_ID
STACK_TEXT
PROCESS_NAME

For example, if analysis repeatedly points to a third-party .sys file, investigate the corresponding device or software package.

Microsoft recommends debugger and dump analysis for determining the cause of difficult 0x139 crashes.

Understanding KERNEL_SECURITY_CHECK_FAILURE Parameters

Bug check 0x139 contains four parameters.

Conceptually:

KERNEL_SECURITY_CHECK_FAILURE (139)

Arg1: Type of corruption
Arg2: Trap frame address
Arg3: Exception record address
Arg4: Reserved

Parameter 1 is particularly important because it identifies the type of corruption detected.

Microsoft documents numerous possible Parameter 1 values.

Some notable examples include:

Parameter 1	Meaning
0	Legacy stack-based buffer overrun
1	Illegal virtual function table detected
2	Stack-based buffer overrun
3	Corrupted LIST_ENTRY
5	Fatal invalid parameter
8	Illegal array indexing operation
10	Invalid indirect control transfer
11	Invalid memory write detected
14	Invalid object reference count
19	Unsafe modification of read-only data
20	Cryptographic self-test failure
21	Invalid exception chain
22	Cryptographic library error
28	Out-of-bounds buffer access
29	Corrupted RTL_BALANCED_NODE/RBTree entry

The parameter value can dramatically narrow the investigation.

What Does LIST_ENTRY Corruption Mean?

One particularly important 0x139 condition is:

Arg1: 3

This indicates corruption involving a LIST_ENTRY.

Windows drivers and kernel components frequently use doubly linked lists to track objects and resources.

Corruption can occur because of programming errors such as:

• Removing an entry twice
• Improper resource management
• Using an object after it has been freed
• Incorrect synchronization
• Overwriting memory
• Updating a list incorrectly

Microsoft notes that LIST_ENTRY corruption can be difficult to trace because Windows may detect the inconsistency sometime after the original corruption occurred.

This is why the module shown at the final crash location is not always the actual culprit.

Should You Use Driver Verifier?

Driver Verifier is an advanced Windows diagnostic feature designed to stress drivers and expose improper driver behavior.

It can be launched with:

verifier

However, Driver Verifier is not recommended as an indiscriminate first troubleshooting step.

It can deliberately trigger additional crashes when it detects driver violations.

Before using Driver Verifier:

• Back up important data.
• Make sure recovery options are available.
• Know how to enter Safe Mode or Windows Recovery Environment.
• Prefer targeted verification when you already suspect third-party drivers.

To disable Driver Verifier from an elevated Command Prompt:

verifier /reset

Then restart Windows.

For ordinary home users, dump analysis should generally come before aggressively using Driver Verifier.

If KERNEL_SECURITY_CHECK_FAILURE Happens While Gaming

Gaming-related crashes commonly warrant investigation of:

• GPU drivers
• Anti-cheat drivers
• CPU/GPU temperatures
• RAM stability
• XMP/EXPO
• GPU overclock
• CPU overclock
• Power supply stability
• Game overlays
• Monitoring/RGB utilities

First update or cleanly reinstall the GPU driver and return overclocked components to stock settings.

If only one game produces the crash, investigate that game's anti-cheat system and related drivers as well.

If the Error Started After Installing RAM

Perform these checks:

1. Disable XMP/EXPO.
2. Reseat the memory.
3. Confirm motherboard compatibility.
4. Test memory at default speed.
5. Test modules individually if practical.
6. Run a thorough memory test.
7. Check whether different RAM kits have been mixed.
8. Update BIOS if the motherboard manufacturer provides an applicable stability update.

If the problem disappears after removing newly installed RAM, memory configuration or compatibility becomes a strong suspect.

If the Error Started After a Windows Update

Do not immediately assume Windows itself is defective.

A Windows update may expose an existing incompatibility involving:

• GPU drivers
• Network drivers
• Antivirus software
• Storage drivers
• VPN clients
• Hardware utilities

First update the affected device drivers.

If the issue clearly started after a particular update and normal troubleshooting fails, Windows recovery options such as System Restore may be appropriate. Microsoft lists restoring Windows among its general blue-screen recovery options.

If Windows Cannot Boot Normally

If the computer repeatedly crashes before reaching the desktop, use Windows Recovery Environment.

Possible recovery options include:

• Startup Settings
• Safe Mode
• System Restore
• Startup Repair
• Uninstall Updates
• Command Prompt

If Safe Mode works, uninstall recently installed drivers, utilities or security software and restart normally.

When Should Hardware Be Suspected?

Hardware becomes more likely when:

• Different BSOD codes occur randomly.
• Memory diagnostics report errors.
• Crashes continue after a clean Windows installation.
• The system crashes under heavy CPU/GPU load.
• XMP/EXPO causes instability.
• Crashes occur before Windows fully loads.
• SSD diagnostics report errors.
• WHEA hardware errors appear.
• Individual RAM modules fail testing.
• The system recently suffered overheating or power problems.

Possible hardware components include:

• RAM
• SSD/NVMe drive
• Motherboard
• CPU
• GPU
• Power supply

Do not replace hardware based solely on the text KERNEL_SECURITY_CHECK_FAILURE. Gather diagnostic evidence first.

Recommended Troubleshooting Order for IT Technicians

A practical sequence is:

1. Record the exact stop code.

2. Ask what changed immediately before the problem.

3. Collect minidumps.

C:\Windows\Minidump

4. Check Event Viewer.

5. Analyze dumps using WinDbg.

!analyze -v

6. Identify recurring third-party drivers.

7. Update, roll back or remove the suspected driver/software.

8. Run DISM and SFC.

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

9. Test RAM.

10. Disable overclocking/XMP/EXPO.

11. Check SSD/NVMe health and file-system errors.

12. Update BIOS/chipset firmware where appropriate.

13. Perform clean-boot testing.

14. Use Driver Verifier only when advanced driver investigation justifies it.

This approach is usually more effective than reinstalling Windows immediately.

Commands Useful for Troubleshooting

Check Windows system files

sfc /scannow

Repair Windows component store

DISM /Online /Cleanup-Image /RestoreHealth

Scan the C: file system

chkdsk C: /scan

Open Windows Memory Diagnostic

mdsched.exe

Open Device Manager

devmgmt.msc

Open Event Viewer

eventvwr.msc

Open System Configuration

msconfig

Open System Properties

sysdm.cpl

Start Driver Verifier

verifier

Disable Driver Verifier

verifier /reset

What You Should Not Do

Avoid common troubleshooting mistakes.

Do not download random .sys files

Never search the Internet for a missing driver filename and manually copy an unknown .sys file into Windows.

Do not use random "driver updater" utilities

Use Windows Update and official computer/component manufacturers whenever practical.

Do not immediately reinstall Windows

A reinstall may temporarily hide a driver problem and will not repair defective RAM or other failing hardware.

Do not replace the motherboard based only on 0x139

The stop code alone does not identify a failed motherboard.

Do not assume it is a virus

Malware is possible, but KERNEL_SECURITY_CHECK_FAILURE does not by itself mean the computer has been hacked.

Do not ignore repeated BSODs

Repeated kernel corruption can eventually contribute to data loss or filesystem damage.

Preventing Future KERNEL_SECURITY_CHECK_FAILURE Errors

For improved Windows stability:

• Keep Windows updated.
• Install drivers from reputable/official sources.
• Avoid unnecessary driver-update utilities.
• Keep BIOS and chipset software reasonably current.
• Avoid unstable overclocking.
• Verify RAM compatibility.
• Monitor system temperatures.
• Maintain adequate free storage.
• Keep reliable backups.
• Investigate recurring BSODs rather than repeatedly forcing restarts.

Microsoft recommends maintaining sufficient disk space and keeping Windows updated as part of general stop-error troubleshooting.

Frequently Asked Questions (FAQ)

1. What does KERNEL_SECURITY_CHECK_FAILURE mean?

It means Windows detected corruption or another serious integrity problem involving a critical kernel data structure and stopped the operating system to prevent unsafe execution. Its bug check code is 0x00000139.

2. Is KERNEL_SECURITY_CHECK_FAILURE a virus?

Not necessarily.

The error is commonly associated with driver bugs, memory corruption, incompatible software or hardware instability. Malware should be considered only as one possible cause, not assumed from the stop-code name.

3. Can faulty RAM cause KERNEL_SECURITY_CHECK_FAILURE?

Yes.

Defective or unstable RAM can corrupt memory used by the Windows kernel or drivers. Run Windows Memory Diagnostic or a more comprehensive memory test if crashes persist.

4. Can a graphics driver cause this BSOD?

Yes.

GPU drivers operate at a low level and can contribute to kernel crashes. If the error occurs while gaming or using GPU-intensive software, graphics drivers should be investigated.

5. Can outdated drivers cause error 0x139?

Yes.

Old, incompatible or corrupted drivers can be involved in kernel data corruption. Check chipset, GPU, network, storage and other important device drivers.

6. How do I repair Windows files after KERNEL_SECURITY_CHECK_FAILURE?

Run an elevated Command Prompt:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Restart after the scans complete.

7. Where are Windows BSOD dump files stored?

Small dumps are commonly stored at:

C:\Windows\Minidump

A full or kernel memory dump may be located at:

C:\Windows\MEMORY.DMP

8. How can I find which driver caused the BSOD?

Analyze the .dmp file using WinDbg and run:

!analyze -v

Look at the stack, module, image name and failure bucket. Prefer patterns across multiple dumps rather than blaming a driver from a single ambiguous crash.

9. Should I reinstall Windows?

Usually not as the first step.

First investigate drivers, RAM, system files, storage, firmware and crash dumps. Reinstallation is more appropriate after reasonable diagnostics fail or Windows itself is severely damaged.

10. Can XMP cause KERNEL_SECURITY_CHECK_FAILURE?

Yes.

If the RAM is unstable at the XMP profile's speed or timings, memory corruption can result. Temporarily disable XMP and test at default memory settings.

11. Can EXPO cause this error on AMD systems?

Potentially, yes.

EXPO increases memory performance using predefined profiles. If the CPU memory controller, motherboard or RAM is unstable at those settings, BSODs can occur. Disable EXPO temporarily to test.

12. Why does KERNEL_SECURITY_CHECK_FAILURE happen randomly?

Memory corruption may occur earlier than the point at which Windows detects it. A faulty driver can damage a structure, and Windows may discover the corruption seconds or minutes later. Microsoft specifically notes this difficulty with LIST_ENTRY corruption.

13. What is error 0x00000139?

0x00000139 is the numerical Windows bug-check value for KERNEL_SECURITY_CHECK_FAILURE.

14. Can an SSD cause KERNEL_SECURITY_CHECK_FAILURE?

Indirectly, yes.

A failing SSD can cause corrupted Windows or driver files. However, do not replace the SSD solely because you received stop code 0x139; check drive health and logs first.

15. Is Driver Verifier safe?

It is a legitimate Windows diagnostic feature, but it deliberately stresses drivers and can trigger additional BSODs when a violation is detected.

It is primarily suitable for advanced troubleshooting.

16. How do I turn off Driver Verifier?

Open Command Prompt as Administrator and run:

verifier /reset

Then restart Windows.

17. Why does the error occur only while gaming?

Gaming increases GPU, CPU, RAM and power demand and may load kernel-level GPU and anti-cheat drivers. This can expose an unstable driver, memory configuration, overclock or hardware problem.

18. Should I update BIOS to fix KERNEL_SECURITY_CHECK_FAILURE?

A BIOS update may help when the manufacturer specifically addresses compatibility or stability problems. It should not be treated as the first universal solution.

19. Does KERNEL_SECURITY_CHECK_FAILURE mean my computer was hacked?

No.

The name can sound alarming, but the stop code indicates Windows detected an unacceptable kernel integrity condition. It is not evidence by itself that an attacker has compromised the computer.

20. What should I send to an IT technician for diagnosis?

The most useful information includes:

• Exact BSOD stop code
• Photograph/screenshot of the error
• Recent hardware/software changes
• Windows version
• Computer model
• Minidump files
• Approximate crash time
• Description of what you were doing when the crash occurred

The files in:

C:\Windows\Minidump

are particularly useful for advanced diagnosis.

Conclusion

KERNEL_SECURITY_CHECK_FAILURE (0x00000139) is a serious Windows stop error indicating that the kernel detected corruption or another integrity violation involving a critical data structure.

The error does not automatically mean that Windows is corrupted, the motherboard has failed or the computer has been infected with malware.

The most important areas to investigate are:

• Device drivers
• RAM stability
• Recent hardware/software changes
• Windows system-file integrity
• GPU/chipset/storage drivers
• Overclocking and XMP/EXPO
• Storage health
• BIOS/UEFI compatibility
• Third-party low-level software

For repeated crashes, minidump analysis is one of the most valuable diagnostic steps because it can provide evidence about the driver, code path and corruption type involved.

Rather than applying random fixes, technicians should collect crash information, analyze patterns across dumps, isolate recent changes, test memory and storage, and only then consider major actions such as hardware replacement or Windows reinstallation.

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