Windows 11


Effective Solutions to Resolve UNEXPECTED_KERNEL_MODE_TRAP Error on Windows 11


The UNEXPECTED_KERNEL_MODE_TRAP error with code 0x0000007F occurs when the OS fails to catch a trap generated by the Intel CPU. This error can happen due to a bound trap or a double fault and requires a system restart. In either case, the system will fail and require a restart.

Reasons for this error include faulty RAM, damaged CPU, outdated or corrupted drivers, overclocking hardware, and conflicts between drivers. It is most common when the computer is under stress, such as running demanding applications or games. We will discuss the solutions hereafter.

1. Disconnect peripheral devices

Unplug all external devices from your PC except for the mouse and keyboard. The devices include printers, scanners, USB drives, external hard drives, and any other devices you have connected to your PC via USB or other ports. Then, turn on your computer and let it boot up completely.

If your system functions correctly after the restart, then you may have found the source of the problem. Try connecting one external device at a time to see which one of the devices causes the error to return. If you find that a particular device is causing the problem, try updating its drivers or using a different device.

2. Start PC in Safe Mode to fix UNEXPECTED_KERNEL_MODE_TRAP

Safe Mode is a diagnostic Windows feature that loads only essential drivers and services. It helps identify hardware and software problems, including UNEXPECTED_KERNEL_MODE_TRAP. It eliminates non-essential drivers, isolates software conflicts, and reduces hardware stress.

Use the following steps to complete the solution:

  1. Press the Windows + S keys to access the search box, enter Recovery options, and click on the correct app to open.
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  2. Then, find Advanced startup and select Restart now.
  3. When the next window opens, choose Troubleshoot.
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  4. Then click on Advanced options.
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  5. Afterward, select Startup setting and then select Restart.
  6. Finally, choose the following option:
    • F5 – Enable Safe Mode with Networking
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3. Run the Windows Memory Diagnostic tool

If the error is due to a RAM issue, running the Windows Memory Diagnostic tool can help you rectify it. This built-in tool inspects your computer’s RAM for errors and tries to fix them, if any. To use the tool, follow these instructions:

  1. Click the Search icon on the Taskbar, enter memory diagnostic, and then click on the Windows Memory Diagnostic app to launch the tool.
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  2. When the Windows Memory Diagnostic window opens, click Restart now and check for problems (recommended) to run diagnostics immediately.
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  3. Allow the tool to check for memory problems.
  4. Afterward, Windows will display the test result for you.

4. Check the hard drive for errors (chkdsk)

Running a CHKDSK scan can fix the UNEXPECTED_KERNEL_MODE_TRAP if the cause is a faulty or failing hard drive or a corrupted file system. The CHKDSK Windows utility scans the hard drive for errors and repairs them if possible. Here is how to do it:

  1. Hold down the Windows and S keys simultaneously, search for cmd, and then choose to Run as administrator to start the Command Prompt as an admin.
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  2. Enter the following command in the Command Prompt window and press the Enter key:
    chkdsk /f /r
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  3. Finally, enter Y and restart your PC so the utility can check for file system errors and search and shield bad sectors.
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Sometimes, conflicts can occur while installing programs or using Windows. However, performing a clean boot is to detect and resolve these conflicts. It involves temporarily disabling all non-essential startup programs and services. This way, you can detect if any program or service is causing the installation errors.

Here is what you need to do to perform a clean boot:

  1. Hold the Windows and R keys to open the Run dialog box; type msconfig in the Run entry field, and press Enter.
  2. Then, locate the Services tab, click on it, and check the Hide all Microsoft services box.
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  3.  Click on the Disable all button and then click Apply.
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  4. Select the Startup tab and then click Open Task Manager.
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  5. Now right-click on the first enabled app on the Task Manager tab and click Disable.
  6. Finally, follow step 6 to disable all enabled applications one after the other.
  7. After disabling the apps, close Task Manager.
  8. Restart your PC.

6. Update Windows

Windows updates are a likely solution for correcting the missing UNEXPECTED_KERNEL_MODE_TRAP by removing bugs with Windows updates bug fixes for identified issues and installing new drivers for your computer’s hardware. Use the following steps to update Windows:

  1. Firstly, press the Windows + I key combination to open Settings or do it with the Windows icon on the Taskbar.
  2. Once Settings opens, select the Windows Update option and click the Check for updates button to discover new updates.
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  3. Then, follow the on-screen instructions step by step to install the update.
  4. Finally, restart your computer.


Performing the System File Checker (SFC) scan can fix the UNEXPECTED_KERNEL_MODE_TRAP on Windows 11 if caused by corrupted system files. SFC Windows utility scans your computer for missing or corrupted system files and replaces them with correct versions. Use the following steps to run an SFC scan:

  1. Press the Windows and S keys together and type cmd in the text field.
  2. Then, choose the Run as administrator option on the right side to start the Command Prompt with administrator privileges.
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  3. Once the User Account Control prompts you, select Yes to continue.
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  4. When the Command Prompt displays, enter the following command into the prompt and tap the Enter key to start an SFC scan:
    sfc /scannow
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  5. Once the scan is complete, copy and paste the command below and press the Enter key to run the command:
    DISM.exe /Online /Cleanup-image /Restorehealth
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  6. Finally, it would be best to restart your computer to implement repairs.

8. Perform system restore to fix UNEXPECTED_KERNEL_MODE_TRAP

System Restore is a Windows built-in feature that reverts your system files and settings to an earlier point in time, effectively undoing any recent modifications that may have generated the UNEXPECTED_KERNEL_MODE_TRAP. This fix can be practical if the error starts occurring after installing a new program, driver, or Windows update. Here is how to do it:

  1. Press the Windows + R key simultaneously to begin the Run dialog on your PC and enter rstrui. Press Enter after to open it.
  2. Select the Choose a different restore point option when the System Restore wizard comes up.
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  3. Then, tap the Next button to proceed. 
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  4. Once the next window opens, select your restore point and click Next
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  5. Allow the process to run and complete.
  6. Finally, click Finish when the restore is complete.

In conclusion, to resolve the UNEXPECTED_KERNEL_MODE_TRAP error on Windows 11, update drivers, perform Windows Updates, check hardware, run antivirus scans, repair system files, and use system restore.

Remember to create backups of important data to ensure the safety of your files. With these solutions, you can regain the stability and functionality of your Windows 11 system.

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Richard Omachona
Richard is a techie in providing fixes and solutions for computer issues of various kinds. Among his contemporaries, he is a preferred choice. His experiences are vast in Windows operating systems, and several other skills in programming such as Python, Web Frontend designing implementing at industry standards, best practices in HTML, CSS and JavaScript. and basics in Web Backend. He also loves traveling, gaming and music.