2 Ways to Fix Nvlddmkm.sys BSOD in Windows

I’ve got a Nvidia GeForce GT 630M in a laptop, and a day I was playing a game, but after launching it there was the Blue Screen of death (BSOD). The error returned was “nvlddmkm.sys”… — nvidia forums

Nvlddmkm.sys is a NVIDIA Windows driver file, allowing your computer to communicate with NVIDIA devices like the GPU. It’s a very useful file but sometimes it will be the culprit of PC BSOD issues.

The nvlddmkm.sys failed may be the reason for various BSOD stop codes like Video TDR Failure, System Thread Exception Not Handled, Unexpected Kernel Mode Trap, Page Fault In Nonpaged Area, etc.

To solve the nvlddmkm.sys failed BSOD issue, you can try the following 2 methods.

Fix 1. Update or Reinstall the NVIDIA Graphics Driver

As mentioned above, the nvlddmkm.sys is a NVIDIA GPU driver. Then, the nvlddmkm.sys failed BOSD may be caused by the outdated NVIDIA GPU driver. In this case, you can try updating or reinstalling it to solve this BSOD issue. Here is the guide:

Step 1: Boot into Safe Mode. Only in Windows or Safe Mode, you can update or reinstall drivers.

• Power on and turn off PC 3 times. The PC will run Automatic Repair. If the Automatic Repair couldn’t repair your Windows 10 PC problems, you can then click the Advanced button to enter into WinRE.
• Go to Troubleshoot > Advanced options > Startup Settings > Restart.
• Press F5 to start Windows 10 PC in Safe Mode with Networking.

Step 2: Press Windows key + X and then select Device Manager in the pop-up menu to open this tool.

Step 3: In the Device Manager window, expand the Display adapters, right-click the NVIDIA GPU driver, and select Update driver. Then, select Search automatically for updated driver software in the pop-up window.

After updating the driver, you can check whether the issue is solved. If not, you can try reinstalling the GPU driver. Here is the guide:

• Download the latest version of the graphics driver from the NVIDIA’s website.
• Open Device Manager, right-click the driver and choose Uninstall device.
• Navigate to C:WindowsSystem32Drivers.
• Find the sys file and rename it to nvlddmkm.sys.old.
• Find NVIDIA folder in C drive of your system and copy-paste sys_file to the desktop.
• Open the command window and run command exe nvlddmkm.sy_nvlddmkm.sys.
• Go to C drive again and copy the newly created file sys.
• Paste the copied file into the C:WindowsSystem32Drivers

Then, restart the PC to see whether the nvlddmkm.sys BSOD is solved.

Fix 2. Underclock the GPU

Some users have reported that they fixed the nvlddmkm.sys failed BSOD issue by underclocking GPU. Although this may result in a minor performance loss, it gets rid of the error. You can use MSI Afterburner to underclock the GPU. Here is the guide:

• Launch the MSI Afterburner utility and look for a slider that reads Core Clock.
• Adjust the slider and move it towards the left until it’s at -50 or so.
• Apply the settings and restart your computer.

If all the above methods, you can use some methods suitable for almost all BSOD issues to solve the issue. Please refer to this post: Windows 10 Blue Screen of Death – You Can Quickly Fix It.