Fix: Unexpected Kernel Mode Trap [0x0000007F]

One of the most annoying and frustrating error in Windows platform is “0x0000007F” or “UNEXPECTED KERNEL MODE TRAP”. This error can be a nightmare for Windows users if it appears in the middle of the work. It affects Windows 7, Windows 8, Windows 8.1 and Windows 10. It’s a bug check which indicates that CPU has generated a trap and the kernel failed to detect the trap. Unexpected Kernel Mode Trap shows BSOD (Blue Screen of Death) that can be caused usually by driver problem or memory problem on your PC.

Well, in this article, we will help you fix the problem. You will find the reasons that cause this error and also working methods to fix 0x0000007F error on Windows 10.

What Causes 0x0000007F Error? 

UNEXPECTED KERNEL MODE TRAP or 0x0000007F can be caused by incompatible driver or hardware failure.

The most common drivers which are often responsible for this error are netio.sys, wdf01000.sys, usbxhci.sys, ntfs.sys, win32kfull.sys, nvlddmkm.sys, ndu.sys.

Anti-viruses are also responsible for the 0x0000007F error such as AVAST, AVG, ESET etc. The message below is often displayed on the screen when this error occurrs.

12 Ways to Fix Unexpected Kernel Mode Trap Error

Here are the 12 methods to fix this 0x0000007F error :

1. Check Hardware Connections

To fix this problem, check all the connections of the hardware. Make sure all the wires are on their proper places. Remove all the hardware except keyboard and mouse and then connect the other hardware one by one to check which hardware caused this error.

Also make sure that the hardware should be compatible with the Windows version.

2. Check Recently Installed Software

Incompatible software is also responsible for Unexpected Kernel Mode Trap or 0x0000007F error. For fixing this error, you need to check the recently updated software.

If any software is downloaded recently, then check this error by uninstalling the software. Sometimes, a third party software is responsible for this error.  The process of uninstalling a software is shown below-

  •  Click Start button
  •  Go  to Control Panel

  •  Under program, click on Uninstall a Program
  •  Select the program you want to remove
  •  Click Uninstall 

3. Run a System Scan

One possible reason of this error could be malware infection or any virus. For fixing this error, system scan will be helpful. It will help you to find all types of malware and viruses which are responsible for this error.

Many types of antivirus packages are available online as well as in the market. If the Unexpected Kernel Mode Trap error is caused by any virus or malware, then it will be detected easily by system scanning and the error can be fixed.

You can use the default Windows Defender or any other paid antivirus software like Bitdefender, Avira, Avast, Norton, Malwarebytes etc.

4. Check Windows Updates

Incompatible version of Windows (to the software and hardware) can lead to 0x0000007F or blue screen error. Updating the Windows could help you to fix the blue screen error. To update Windows, follow these steps –

  •  Click on Start button
  •  Click on Settings
  •  Go to Update & Security
  •  Click on Check for Updates

  • Restart your computer

5. Update Drivers

Outdated drivers of the PC does not supports the new software and thus create many types of errors including BSOD. As you don’t know which driver is creating this problem, you should update all the drivers on your computer.

For solving this type of error, check for update models for Windows and update the drivers of the device. Old drivers might not work properly. Updating the driver can be done manually by going on manufacturer’s website and search for the most recent and compatible driver. Automatic update options are also available.

To update manually, these are the steps-

  • Click on Start button
  •  Open Windows Device Manager
  •  Right click on a driver from list (which need to be updated)
  •  Choose Update Driver option

To update automatically, follow these steps-

  •  Click on Start button
  •  Go to Devices and Printers
  •  Select Device Installation Settings
  •  Select “Check for drivers automatically” or “Yes, do this automatically”
  •  Click on Save Changes

You can also use a driver updater tool to update drivers.

6. Remove Problem Causing Drivers

Any of the installed driver could create this error. You should check which is the error causing driver and uninstall it to fix the error. Follow these steps to uninstall a driver-

  •  Go to the Start menu
  •  Click on Advanced Startup
  •  In Advanced Startup choose Troubleshoot > Advanced Options > Startup Settings
  •  Click on Safe Mode
  •  Go to Device Manager
  •  Select the problematic driver, right click on it and Choose Uninstall

7. Run SFC Scan

SFC is a troubleshooter which scans the system for broken files and repairs them. Repairing the files can resolve this error. Here are the steps to Run SFC scan-

  • Right click on Start menu
  •  Open Command Prompt
  •  Type “sfc/scannow” and press Enter
  •  Wait till the process completes
  •  Restart your computer

This should fix the problem.

8. Disable Memory Caching

To disable cache memory, follow these steps to check whether the error 0x0000007F is fixed or not –

  •  Restart your PC
  •  Click on DEL key or F2 and enter BIOS setup
  •  Go to Advanced menu
  •  Select Cache Memory
  •  Make the Cache memory disable
  •  Click on Save & Exit

9. Run Memory Diagnostics

The Unexpected Kernel Mode Trap error could be occurred due to memory corruption. To Run memory diagnostics could fix this error.  To Run Memory Diagnostics, follow these steps-

  •  Click on Windows key and R simultaneously
  •  Type “mdsched.exe” in the box and press Enter
  •  Click on Restart Now option
  •  Windows will automatically check the memory. Wait till the process completes 100 percent.
  •  Window will start automatically

Else you can remove the RAM stick and connect it again properly. Sometimes doing this can fix the error.

10. Run BSOD Troubleshooter in Windows 10

It might help to fix the Unexpected Kernel Mode Trap. It can be used to check various problems including BSOD issues. Here are the steps to run Windows Troubleshoot-

  • Open the Settings app and go to Update & Security option
  •  Select Troubleshoot 
  •  Select BSOD and click on Run the troubleshooter option
  •  Follow the instruction on the screen and complete the process.

11. Run Chkdsk Scan

By running chkdsk scan, this error cam be fixed. This type of error can occur due to corrupted files on hard drive. Follow these steps to run chkdsk scan-

  • Press Windows Key and X simultaneously and choose Command Prompt
  •  Type “chkdsk/r c:” and press Enter
  •  Screen shows a message to schedule disk checking the next time you restart your PC. Type Y and press Enter
  •  Restart your PC, and the chkdsk scan will start automatically.

12. Run DISM

DISM (Deployment Image Servicing and Management) is used to re-deploys the system image all over again. These are the steps to run DISM-

  •  Right click on Start 
  •  Open Command Prompt
  •  Type “DISM/Online/Cleanup-Image/RestoreHealth” and press Enter
  •  Wait till the process completes
  •  Restart your computer and try updating again

Conclusion

These are the 12 best steps to fix the UNEXPECTED_KERNEL_MODE_TRAP or 0x0000007F error. These methods are helpful to fix this error in an easy manner. If you tried these steps wisely, you are now using your PC without being frustrated by this error. Hope I helped you in fixing this error. For any query regarding the topic, comment below in the comment section. Have a nice day ahead!

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