FIX: ndu.sys BSoD error in Windows 10

Ivan Jenic
by Ivan Jenic
Troubleshooting Expert
Passionate about all elements related to Windows and combined with his innate curiosity, Ivan has delved deep into understanding this operating system, with a specialization in drivers and driver troubleshooting. When he's not tackling... Read more
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  • The Ndu.sys error usually occurs when there is a hardware or driver incompatibility.
  • If the error driver irql not less or equal (Ndu.sys) appear randomly after a few minutes, check for driver updates.
  • Renaming the folder is the simplest solution to get rid of the Ndu.sys  blue screen error.
  • Ndu.sys is related to your Wi-Fi adapter driver, so make sure to check for network issues.
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Have you installed the latest Windows 10 OS version to see how it goes? Well, unfortunately, some users have experienced some trouble along the way with the Ndu.sys error.

This is certainly one of the most common and not that straightforward errors you can get in Windows 10.

Rest assured,  after following the steps listed in this tutorial, you will fix Ndu.sys errors in Windows 10 and continue your testing of the new operating system.

The error driver irql not less or equal (Ndu.sys) comes with the traditional blue screen. You can see multiple stop code errors like KMODE EXCEPTION NOT HANDLED (Ndu.sys)  or SYSTEM SERVICE EXCEPTION.

This means that if you get it during your usage, it won’t really go away unless you reboot your operating system and even then it might appear randomly after a few minutes.

This error message is caused by incompatible hardware drivers and, to be more specific, the Wireless adapter driver.


How can I solve the Ndu.sys Blue Screen of Death error?

1. Rename the Ndu.sys folder

  1. Open the My Computer icon by double-clicking on it or by going to the Start menu and left-clicking on it from there.
  2. Double click to enter the C:/ partition or whichever partition you have installed your Windows 10 on.
  3. Double click on the Windows folder to open it.
  4. Now search for the System32 file inside the Windows folder and double click it to open.
  5. Now go to the System32 folder look for the drivers folder and double click on it to open.
  6. After you got to the Drivers folder, you will have to look for the Ndu.sys file.
  7. Right-click on the Ndu.sys file and left click or tap on the Rename feature from the menu that pops up.
  8. Name the Ndu.sys as Ndu.sys11 or whichever name you wish but be sure to change the name and remember it. If you cannot change the name of the file you will have to log in with your administrator account or simply change the permissions you have on this specific file to administrator.
  9. Open again the C: partition you have Windows 10 installed.
  10. Search in the C: partition for the Windows.old folder this time because this should be the old Windows operating system you upgraded from.
  11. Open again the System32 folder you have in the Windows.old folder.
  12. Now find and double click to open the drivers folder.
  13. Search in the drivers folder for the Ndu.sys file.
  14. Right-click on it and select the Copy option.
  15. Now paste it in the drivers folder of the Windows 10 version.
  16. Restart your computer.
  17. Check to see if you still have the same BSoD with error Ndu.sys but I am sure that you will not have any more issues with it from now on.

2. Install the latest network card drivers

Updating drivers by yourself can be time-consuming. We recommend using a third-party tool to update automatically all your driver that will spare your time for manually searching drivers.

Various errors are the result of a malfunctioning driver. When this is the case, you may need to update or reinstall completely this specific component. As the process is not straight-forward to complete, we recommend using an automated tool for the job. Here's how to do it:

  1. Download and install DriverFix.
  2. Launch the app.
  3. Wait for the software to detect all your faulty drivers.
  4. You will now be presented with a list of all the drivers that have issues, and you just need to select the ones you’d liked fixed.
  5. Wait for DriverFix to download and install the newest drivers.
  6. Restart your PC for the changes to take effect.
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3. Check for updates

Updating your Windows 10 system is a good way of keeping your computer away from any BSoD errors. 

Updates from Windows usually add new features to the current version, add new security features, repair bugs from the previous OS version. 

As Ndu.sys error is a blue screen issue mostly related to your wireless adaptor or driver incompatibility, a Windows Update might address this problem.

Run a System Scan to discover potential errors

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To check if you have any pending updates, go to Update & Security from the Settings app.


4. Use a different Internet connection

If you are using a wired internet connection on your Windows 10 computer, try switching it to Wireless and check if you still have the same error message.

If you are using a wireless Internet connection do the opposite and switch to a wired internet connection to see if you still get this error message.


5. Reset Windows 10

  1. Type reset this PC in the Windows search box.
  2. Choose Reset this PC to open the window shown directly below.reset pc
  3. Press the Get started button.
  4. Select the Keep my files option.
  5. Select the Next and Reset buttons to confirm.
  6. Reset process will now start. Follow the instructions on the screen to complete the reset.
  7. Wait for the process to complete. This may take a few minutes, depending on the number of software installed on your machine.

Note: Another method that you can use to fix Ndu.sys errors is refreshing Windows 10. Once you’ve hit the Refresh button, the OS will remove all third party software installed on your computer.


6. Run the BSOD troubleshooter

  1. Open the Settings app and go to Update & Security section.
  2. Click on Troubleshoot from the menu on the left.
  3. Choose BSOD from the right pane and click Run the troubleshooter.
  4. Follow the instructions on the screen to complete the troubleshooter.

Note: BSOD errors are quite frequent on Windows 10. For this reason, Microsoft added a built-in BSOD troubleshooter to Windows 10’s Settings page.


7. Clean install Windows 10

If nothing worked, performing a clean reinstall is pretty much the last resort method.

Start from scratch allows you to get rid of all the elements that triggered Ndu.sys errors and fix the issue for good.

So, if you want to clean install Windows 10, you need your installation drive or DVD and a lot of patience. The whole process usually takes one hour or two.


We hope that these solutions helped you get your network up and running until Microsoft releases a hotfix for this issue.

This is all you need to do in order to fix the Ndu.sys error message in Windows 10. Also, if you need further help with this issue, please let us know by posting a comment in the comments below.


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