Computer Support Blog

Windows 10 High CPU usage by service host: local system

In Task Manager, you may find that the Service Host: Local System is taking much of your disk, CPU and Memory usage. This post shows you how to fix the problem service host local system high CPU.

'Service Host: Local System' Consuming too Much CPU?

Quite a number of Windows 8 users have suffered from a problem where up to 100% of their CPU and/or Disk have been used by a process known as System Host: Local System. This problem has stuck around to haunt the brave users of Windows 10.

While others complain that they found that their Service Host: Local System in Task Manager is eating their disk, CPU and memory or come across the issue system host local system high disk or service local system high CPU.

System Host: Local System is pretty ambiguous as it is not any one service but a guise under which a number of different Windows system services run, any of which could be causing unusually high CPU and/or Disk usage.

To make things worse, this issue can also be caused by memory leak in the non-paged pool of memory. Thankfully, due to a lot of intelligent dwelling on the matter.

Methods to Fix Service Host Local System High Disk Usage

Superfetch – a service that Microsoft claims aims to maintain and improve the performance of computers as time goes. If, in any case, Superfetch is the root of the issue, you can just quickly fix the problem by disabling Superfetchit. 

Method 1: Change Registry Value Data

If Superfetchit is not the root of the issue, it is certainly being caused by a memory leak in the non-paged pool. You may try other methods. In order to solve the issue service host high CPU, you can try to fix the Registry.

However, please note that changing registry is very risky. So you had better back up your Windows 10 to keep computer safe before proceeding.

I will show you how to change registry value data to solve the issue of service host local system high memory.

Step 1. Open Registry window.

  1. Press Windows key and R key simultaneously to open the Run
  2. Type regedit and click OK to continue.

Step 2: Change Value data.

  1. In the Registry Editor window, please navigate to the ControlSet001 folder according to the following path: HKEY_LOCAL_MACHINE > SYSTEM > ControlSet001
  2. Then expand the ControlSet001 folder to find out Services folder and choose the Ndu key.
  3. In the right panel, select the Start key and double-click it.
  4. Next, change its Value data to 4 and click OK to continue.


When you have finished all steps, you can exit the Registry Editor window and reboot your computer to check whether the issue of service host local system high CPU Windows 10 is solved.

Method 2. Run System File Checker

The issue service host local system high disk may be caused by corrupted system files. So if you come across the issue service host local system high CPU, you can try to run System File Checker to check and repair the corrupted system files.

Step 1: Open Command Prompt window.

  1. Type Control Panel in the search box of Windows.
  2. Choose the best-matched one and right-click it to choose Run as administrator.

Step 2: Type the commands.

  1. In the popup window, type the command sfc /scannow and hit Enter to continue.
  2. Please don’t close the window until the scanning process to be finished.

When the scanning process is finished, the System File Checker can help you to find the corrupted system files and repair them.

Method 3: Disable Background Intelligent Transfer Service

Step 1: Open System Configuration window.

  1. Press Windows key and R key together to open the Run
  2. Type the msconfig in the box and click OK to continue.

Step 2: Disable Background Intelligent Transfer Service.

  1. In the System Configuration window, please go to the Services tab.
  2. Scroll down and find out the Background Intelligent Transfer Service and unchecked it.
  3. Click Apply and OK to confirm the changes.

When you have finished all steps, you can restart your computer to check whether the issue service host high CPU is solved.

Method 4. Upgrade CPU

The CPU, also called Central Processing Unit, is an indispensable part of the computer. The issue service host local system high disk may be caused by the old CPU.

So, if you come across this issue, you can try to upgrade it. And we will show you the detailed tutorials.

However, the upgrading CPU is always a risky thing. Your computer may fail to boot due to some incompatibility problem after upgrading CPU.

If so, you may need to reinstall Windows. Thus, you can back up your data before updating the CPU so as to keep your data safe.

Backing up Data Before Updating CPU

In order to back up data, you can use the professional file backup software – MiniTool ShadowMaker.

MiniTool ShadowMaker is designed to back up the disks, partitions, files, folders and even the operating system. It can also help you to perform some recovery solutions.

In particular, when your computer fails to boot, you can use the system image created in advance to restore the computer to a normal state.

In addition, MiniTool ShadowMaker is also a clone tool which can help you to clone OS from HDD to SSD without reinstalling Windows.

In order to upgrade CPU without reinstalling Windows and losing any data, you can back up the operating system immediately.

Thus, try MiniTool ShadowMaker Trial at once or you can choose to purchase an advanced edition.

After you have backed up your important files, it is time to upgrade CPU. But please note that the CPU should be selected according to the motherboard’s model and performance parameters.

Then you can install the new CPU on your computer.

After upgrading, you need to upgrade the drivers. If the computer fails to boot due to some incompatible problem after upgrading CPU, you may need to install the Windows 10.

As you have backed up all important files, you don’t worry that your files will lose.

More Methods

If none of the above solutions is effective, you can try out more methods including Disable Service Host Local System Task, or Perform a Clean Boot.

Bottom Line

In conclusion, this post has shown you how to solve the issue service host local system high disk with different solutions. If you have the same issue, try these solutions.

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