> ## Content Index > Fetch the complete content index at: https://techbytefix.com/llms.txt > Use this file to discover other available public pages before exploring further. # Fix KERNEL_SECURITY_CHECK_FAILURE and Stop Windows Crashes - URL: https://techbytefix.com/fix-kernel-security-check-failure/ - Published: 2026-10-23T00:09:52.000Z - Updated: 2026-10-23T00:09:52.000Z - Author: Jake Whitman - Tags: Troubleshooting KERNEL\_SECURITY\_CHECK\_FAILURE is a Windows stop error caused by a problem with protected kernel data or operations, most often a faulty driver, defective RAM, disk errors, or damaged Windows files. Start by protecting your files, then use Safe Mode to undo a recent driver or update, test memory and storage, and repair Windows before considering hardware replacement or reinstalling Windows. ## What does KERNEL\_SECURITY\_CHECK\_FAILURE mean? Windows shows this blue screen when a kernel-level check finds data or behavior it considers unsafe. The kernel coordinates hardware, memory, drivers, and core system services, so Windows may stop immediately to limit further corruption. ```text KERNEL_SECURITY_CHECK_FAILURE ``` Error The timing can narrow the cause. A crash that began after installing a graphics, network, storage, or security driver makes that driver a strong suspect. Crashes during games or other memory-heavy work can involve RAM or a graphics driver. Slow file access, repeated disk errors, or crashes while Windows starts can point to storage trouble. An interrupted update or unexpected shutdown can damage Windows files and produce the same stop code. New RAM, a replacement SSD, an overclock, or a BIOS setting can also make a stable installation fail. The stop code confirms a kernel safety violation; it does not identify whether the driver, memory, disk, or Windows itself is responsible. ![A close view shows a Windows PC monitor displaying a system error screen.](https://tse1.mm.bing.net/th?q=Windows%20PC%20error%20screen%20closeup&w=624&h=352&c=7) ## Can you still start Windows safely? These steps apply to supported Windows 10 and Windows 11 PCs. You need an Administrator account for driver changes, repair commands, and some diagnostic tools. Safe Mode and Windows Memory Diagnostic restart the computer, so save open work first. If Windows remains usable, back up important documents before changing drivers or running repairs. If it crashes before sign-in, use Windows Recovery Environment instead. Start with these low-risk checks: - Disconnect newly attached USB devices, docks, or external drives, then restart. Leave the keyboard and mouse connected. - If Windows stays open long enough, record when the crashes happen and check `C:\Windows\Minidump` for newly created dump files. For Safe Mode, hold `Shift` while selecting **Restart**, then choose **Troubleshoot > Advanced options > Startup Settings > Restart**. Press `4` for Safe Mode or `5` for Safe Mode with Networking. Safe Mode loads a limited set of drivers. If the blue screen stops there, a driver or service used during normal startup becomes more likely. If you cannot reach the sign-in screen, interrupt startup by turning the PC off when the Windows logo appears. Repeat this until Windows opens Automatic Repair, then select **Advanced options**. You can also boot from Windows installation or recovery media and choose **Repair your computer**. Avoid repeatedly interrupting a running update; use recovery only when normal startup is not possible. ![A Windows PC displays a recovery startup screen on its monitor.](https://tse1.mm.bing.net/th?q=Windows%20PC%20recovery%20startup%20screen&w=624&h=352&c=7) ## Try these fixes in the safest order Begin with changes that are easy to reverse. Use an Administrator account for the settings and commands below. 1. Remove a recently installed driver or update. In Safe Mode, open Device Manager, expand the hardware category related to the crash, right-click the recently changed device, and select **Properties > Driver > Roll Back Driver** when available. If rollback is unavailable, choose **Uninstall device**, restart, and let Windows load a basic driver. Do not select an option that deletes driver software unless the device manufacturer specifically directs you to. If the crash began after a Windows update, review update history. \`\` `text title="Settings path" Settings > Windows Update > Update history > Uninstall updates `\`\` Remove only an update installed immediately before the crashes began. If the blue screen stops, get a current driver from the PC or hardware manufacturer's support page rather than a random driver-download site. If Safe Mode still crashes, stop repeatedly uninstalling devices and continue with recovery-based checks. 2. Test memory with Windows Memory Diagnostic. Close programs, open Start, search for `Windows Memory Diagnostic`, select **Run as administrator**, and choose **Restart now and check for problems**. The test runs before Windows starts. Its result may appear after sign-in; you can also open Event Viewer and inspect **Windows Logs > System** for `MemoryDiagnostics-Results`. \`\` `text title="Expected output" Windows Memory Diagnostic tested the computer's memory and detected no errors `\`\` If errors are reported, shut down the PC and reseat removable memory only if you know how to do so safely. Test modules individually or use the computer manufacturer's replacement procedure. Faulty RAM should be replaced; software repair will not correct it. If the test reports no errors, continue checking storage and Windows files because a clean memory test does not rule out those causes. 3. Check the system drive. Open **Command Prompt as Administrator** and run the online scan first. \`\` `cmd title="Command Prompt (run as Administrator)" chkdsk C: /scan `\` ` The scan should complete without finding problems. If it reports errors that need repair, save your work and run: `\` `cmd title="Command Prompt (run as Administrator)" chkdsk C: /f `\` ` Windows may say the volume is in use and ask to schedule the check for the next restart. Type `Y\`, restart, and allow it to finish. Do not power off during the repair. If the scan repeatedly reports errors, or the drive disappears, makes unusual noises, or shows warning health data, back up immediately and plan to replace the drive. If the scan finds no errors, move on to Windows file repair; a clean scan does not explain every crash. 4. Repair the Windows component store and protected system files. Run these in an elevated Command Prompt, in order. \`\` `cmd title="Command Prompt (run as Administrator)" DISM.exe /Online /Cleanup-Image /RestoreHealth sfc /scannow `\` ` DISM may take time and needs access to Windows repair files, sometimes through Windows Update. A successful SFC result says it found no integrity violations or repaired damaged files. `\` `text title="Expected output" Windows Resource Protection did not find any integrity violations. `\`\` If SFC says it could not repair some files, restart and run it once more after DISM completes. If DISM cannot find source files, the Windows installation source may be unavailable or mismatched; use a repair source matching your Windows edition and build rather than guessing at a source path. If both commands complete successfully but the stop code returns, investigate drivers, hardware, and firmware rather than repeating the same repairs. 5. Update hardware drivers and Windows only after the system is stable enough to do so. Prefer Windows Update or the PC, motherboard, graphics, storage, and network-device manufacturer's support page. Install one driver package at a time. If a new driver brings the blue screen back, roll it back and record its name and version. ## How will you know the problem is fixed? Restart normally, not in Safe Mode, after each meaningful change. Sign in and repeat the activity that previously triggered the crash, such as starting a game, copying files, waking the PC from sleep, or connecting a particular device. One successful boot is not enough; use the computer for enough normal work to cover the original trigger. Check Reliability Monitor for a timeline of application and Windows failures. Open Start and search for `View reliability history`. A stable period with no new bug-check events is a useful sign, although it does not prove that a marginal hardware component is healthy. You can also inspect `C:\Windows\Minidump`. A new dump after the repair means Windows crashed again. The file may identify a driver or module, but a named module is not always the original cause; faulty memory can make unrelated drivers appear in a dump. If no new dump is created, check that small memory dumps are enabled and that Windows has enough free space on the system drive. If the same stop code returns, note the exact time, what the PC was doing, and any driver or update installed since the last stable boot. That record makes the next driver, memory, or hardware check more targeted. ![A Windows PC runs normally on a desktop with a monitor and keyboard visible.](https://tse1.mm.bing.net/th?q=Windows%20PC%20normal%20desktop%20testing&w=624&h=352&c=7) ## What if the blue screen keeps coming back? Repeated crashes after clean memory and disk checks, system-file repairs, and driver rollback make hardware or firmware more likely. Undo any overclock or custom memory profile temporarily, return BIOS settings to their defaults, and check the motherboard or PC manufacturer's firmware guidance. Do not flash BIOS firmware while the computer is unstable unless you have a reliable recovery procedure and the update specifically addresses the problem. If you recently added RAM, a graphics card, an SSD, or a peripheral, power down and remove or revert that change when the hardware documentation permits it. Test with one known-good memory module or the original component if available. A qualified repair shop is safer than repeated forced restarts when the machine loses power, cannot complete memory testing, or contains data you cannot replace. If Windows became unstable after a software change and you have a restore point, System Restore can return system files, drivers, and settings to an earlier state without intentionally deleting personal documents. From Windows Recovery Environment, choose **Troubleshoot > Advanced options > System Restore**. Review the affected programs before confirming. Restore points are not backups, so copy important files first if Windows can still start. If the computer cannot boot normally, use Safe Mode or Recovery Environment to copy data and run the checks. Do not reset or reinstall Windows as the first response: that can remove applications and may hide a failing component rather than fix it. If important data is not backed up, prioritize a backup or professional data recovery before aggressive repairs. ## Conclusion Protect your files, then use Safe Mode to undo the most recent driver or update. Run the memory, disk, DISM, and SFC checks, and test the original crash trigger after each change. If the stop code returns, investigate recently added hardware, BIOS settings, or a failing component instead of making random software changes. ## Frequently Asked Questions ### Can a KERNEL\_SECURITY\_CHECK\_FAILURE be caused by a virus? It can happen in systems affected by malicious or poorly written software, but the stop code more often points to a driver, memory, storage, or damaged Windows files. Run a full scan with Windows Security after the PC is stable, and avoid unknown driver or cleanup tools that promise an instant fix. ### Will reinstalling Windows fix KERNEL\_SECURITY\_CHECK\_FAILURE? It may repair persistent Windows corruption, but it will not fix defective RAM, a failing drive, overheating, or incompatible hardware. Use repair commands and hardware checks first. If a clean installation still crashes, hardware or firmware is the stronger suspect. ### Why does the crash happen only during games? Games put sustained load on memory, graphics hardware, power delivery, and graphics drivers. Roll back or update the graphics driver, remove overclocks, test RAM, and watch for display artifacts, overheating, or sudden shutdowns.