How to Fix High CPU or Disk Usage by Ntoskml.exe on Windows 10

How to Fix High CPU or Disk Usage by Ntoskml.exe in Windows 10

Wondershare Recoverit Authors

Dec 21, 2020 • Filed to: Windows Computer Solutions • Proven solutions


Users of Windows 10 often complain about system issues related to Ntoskrnl.exe. The use of this system file often leads to an over-bloated RAM and CPU leading to frustrating experiences such as the Blue Screen of Death. While this may appear an insurmountable challenge at first, there are effective ways to fix the problem. This article will show you how.

What is Ntoskrnl.exe and what does it do?

Ntoskrnl.exe is a chief operating system that handles memory operations in Windows 10. Another name for this file is (Windows NT operating system kernel or kernel image). The kernel image is responsible for providing the executive and kernel layers of Windows NT with sufficient kernel space. Besides this, it is also responsible for hardware visualization, memory, and process management. What this goes on to show is that Ntoskrnl l.exe is indeed a very vital organ of a Windows 10 system.

What it does in your system is quite simple.

If a task is loaded to your RAM along with the task executor program, the Central Processing Unit (CPU) will execute the task after which it will record results in the memory at first and later by the loaded program. This action also has access to several devices in your PC such as the CPU, GPU, ROM, HDD, and SSD. After the program is closed, the task is removed from the memory as well as the data is processed to free up space for newer tasks.

Why Ntoskrnl.exe consumes a lot of Disk Space, Memory and CPU

Although the kernel system file manages memory space, it tends to consume quite a lot of space too most of which are caused by hardware and malware viruses which leads to memory leaks.

How to fix it?

There are so many ways to fix a high CPU or Disk usage using Ntorrskrnl.exe on your Windows 10 but in this article, we will show you four quick and easy methods to get the job done.

Method 1- Disable Windows Search Service

1st Step

On your PC keyboard, tap Windows key + X at once and click on Computer management.

2nd Step

Expand the services and application section and click Services

3rd Step

Double Click on Windows Search

4th Step

Click Stop in the General Tab.

5th Step

Once the service stops, click ok to save and then exit.

Method 2- Check for Incompatible Programs

If you are currently dealing with high disk usage, you may need to check for incompatible programs running on your system. One such program to be on the lookout for are anti-virus programs which may be at variance with some other programs in your Windows. Pay attention to see which program is causing your CPU to take in so much data or causing your system to malfunction in general. If you can identify the program, do not hesitate to uninstall it. If the program is important to you, you can reinstall it again.

Method 3 – Run Command

You can run a command on your Windows device by following the election quick steps

Step 1

Tap your Windows key and type the words "cmd". After right-clicking Command prompt, click on Run as administrator.

Step 2

Type this code "Dism/online/Cleanup-image/RestoreHealth then tap Enter. This process takes a few minutes.

Step 3

After following the above-mentioned steps, the problem should be resolved but if not, you may need to run the command for a second time.

Method 4 – Use Windows Performance Toolkit to Diagnose

To diagnose for errors, here are the steps to follow

Step 1

Install a Windows Performance Toolkit (WPT)

Step 2

Tap the Windows key on your keyboard and type the words "cmd" and right-click the Command Prompt. After doing this, click Run as the administrator.

Step 3

Copy-paste this command

Xperf -on latency -stackwalk profile -buffersize 1024 -MaxFile 256 – FileMode Circular && timeout -1 && xperf -d cpuusage.etl

Step 4

Let the command run for about 60 seconds to enable it to capture your system's high CPU usage. The command will run a trace and give you a prompt warning after which it will revert to C:\prompt

Step 5

The system log will be kept safe in C:\\Windows\system32 including the file name cpuusage.etl

Step 6

From the diagnostic file, you will see the problematic programs

By the way, you can also apply the KB4515384 patch to fix high CPU usage issue.


Fixing a high CPU or Disk usage by Ntoskrnl.exe on Windows 10 is quite easy if you use any of the methods shown above. Although your PC may run very slowly or stop abruptly when running programs because of a loaded CPU, this problem is not without remedy. The steps to fix the problem is easy and will take only a few minutes to complete.

Recoverit author

David Darlington

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