Blog

How to Fix Forbidden Windows Kernel Modification Detected Error in Windows 11: Step-by-Step Guide

The “Forbidden Windows Kernel Modification Detected” error in Windows 11 can be frustrating. It usually appears when the system detects unauthorized changes to the core Windows files or drivers. This error often prevents your PC from booting properly or causes unexpected crashes.

Fortunately, fixing this error is possible by following a few straightforward steps. These steps focus on identifying and resolving the cause of the kernel modification warning. No advanced technical skills are required.

This guide will walk you through simple to more advanced methods to fix the error. Each step is explained clearly so anyone can follow along.

By the end, you should be able to restore your Windows 11 system to normal working order without this error.

Quick Note Before You Begin

  • Backup Your Data: If your PC is still accessible, back up any important files before troubleshooting.
  • Safe Mode Access: Many solutions require entering Safe Mode. Familiarize yourself with this option just in case.
  • Admin Rights: Ensure you have administrator privileges on your PC to perform fixes.
  • Check for External Devices: Disconnect any unnecessary USB devices as they may interfere with system checks.

Step 1: Restart Your PC

Sometimes, the error can be temporary due to a minor glitch. Restarting your computer is the simplest first step. This refreshes all running processes and may resolve temporary conflicts causing the error.

To restart:

  1. Click on the Start menu.
  2. Select the Power icon.
  3. Choose Restart.

If the error persists after restarting, proceed to the next step.

Step 2: Boot into Safe Mode

Safe Mode starts Windows with only essential drivers and services. This helps isolate issues caused by third-party software or drivers.

To boot into Safe Mode:

  1. Press Windows + I to open Settings.
  2. Go to System > Recovery.
  3. Under Advanced startup, click Restart now.
  4. After the PC restarts, select Troubleshoot > Advanced options > Startup Settings.
  5. Click Restart.
  6. When the options appear, press 4 or F4 to enter Safe Mode.

Once in Safe Mode, check if the error still appears. If not, a recently installed program or driver may be causing the problem.

Step 3: Run System File Checker (SFC) Scan

Corrupted or modified system files can trigger the kernel modification error. The System File Checker scans and repairs these files automatically.

To run SFC:

  1. Open the Start menu, type cmd.
  2. Right-click on Command Prompt and select Run as administrator.
  3. In the command window, type sfc /scannow and press Enter.
  4. Wait for the scan to complete. It may take several minutes.
  5. If any corrupted files are found, they will be repaired automatically.

After completion, restart your PC and check if the error is resolved.

Step 4: Use DISM Tool to Repair Windows Image

If SFC does not fix the issue, the Deployment Image Servicing and Management (DISM) tool can repair the Windows system image.

Follow these steps:

  1. Open Command Prompt as an administrator (same way as above).
  2. Type the following commands one by one, pressing Enter after each:
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth

Each command checks and repairs the Windows image. This process can take some time, so be patient.

Once finished, reboot your computer.

Step 5: Check for Recently Installed Software or Drivers

Kernel modification errors can be caused by incompatible or malicious software, especially drivers that interact with core Windows components.

To identify and remove problematic software:

  1. Press Windows + R, type appwiz.cpl, and press Enter to open Programs and Features.
  2. Look for any recently installed applications or drivers.
  3. Select the suspicious program and click Uninstall.
  4. Restart your PC and check if the error persists.

You can also check Device Manager for recently updated drivers:

  1. Press Windows + X and select Device Manager.
  2. Expand categories and look for devices with warning symbols.
  3. Right-click and choose Uninstall device or Roll back driver if available.

Step 6: Disable Secure Boot Temporarily

Secure Boot helps protect your PC from unauthorized firmware and OS code, but it can sometimes trigger false positives on kernel modifications.

Disabling Secure Boot temporarily can help determine if it is causing the error.

To disable Secure Boot:

  1. Restart your PC and enter BIOS/UEFI settings (usually by pressing F2, Del, or Esc during startup).
  2. Locate the Secure Boot option (often under Security or Boot menus).
  3. Set Secure Boot to Disabled.
  4. Save changes and exit BIOS.

Note: Disabling Secure Boot reduces some security protections. Only do this temporarily and re-enable it after troubleshooting.

Step 7: Perform a System Restore

If the error started recently, using System Restore can roll back your computer to a previous state before the problem began.

To perform System Restore:

  1. Search for Create a restore point in the Start menu and open it.
  2. Click the System Restore button.
  3. Follow the wizard and choose a restore point dated before you noticed the error.
  4. Confirm and let the process complete. Your PC will restart.

This method does not affect your personal files but will remove recent system changes.

Step 8: Reset or Reinstall Windows 11

If all else fails, resetting Windows or performing a clean install can fix deep system corruption causing the error.

To reset Windows 11:

  1. Go to Settings > System > Recovery.
  2. Under Reset this PC, click Reset PC.
  3. Choose whether to keep your files or remove everything.
  4. Follow on-screen instructions to complete the reset.

A clean reinstall involves creating a bootable USB with Windows 11 installation media and installing the OS from scratch. This is recommended only if you are comfortable with reinstalling software and backing up data.

Frequently Asked Questions (FAQs)

What causes the “Forbidden Windows Kernel Modification Detected” error?

This error typically happens when Windows detects unauthorized changes to kernel-level files or drivers. Causes include corrupted system files, incompatible software, malware, or faulty drivers.

Can malware cause this error?

Yes, malware attempting to modify protected system files can trigger this error. Running a full antivirus scan is recommended if you suspect infection.

Is it safe to disable Secure Boot?

Disabling Secure Boot reduces some security protections and should only be done temporarily for troubleshooting. Re-enable it once fixed.

Will resetting Windows delete my files?

You have the option to keep your personal files during a reset. However, installed apps and settings will be removed.

How can I prevent this error in the future?

Keep your Windows updated, avoid installing untrusted software, and regularly scan for malware to reduce the chance of kernel modification errors.

When Nothing Works

If you have tried all the above steps and still encounter the error, consider the following options:

  • Contact Microsoft Support: Visit the official Microsoft support website for personalized assistance.
  • Use Windows Recovery Environment: Access advanced recovery options using a bootable USB drive.
  • Consult a Professional Technician: Hardware issues or advanced system problems may require expert help.

Official Microsoft recovery guide: Recovery options in Windows 11.

Conclusion

The “Forbidden Windows Kernel Modification Detected” error in Windows 11 can be alarming but is often fixable with simple troubleshooting steps. Starting with restarting your PC and running system scans can resolve many issues quickly.

If needed, more advanced options like Safe Mode, disabling Secure Boot, or system restore provide additional ways to address the problem. Resetting or reinstalling Windows should be your last resort.

Remember to back up your data regularly and maintain good security practices to minimize such errors in the future. Following this step-by-step guide will help you get your Windows 11 system back to normal safely and efficiently.

Leave a Reply