How to fix sysmain service high cpu usage issue?

If you dealing with sysmain service high cpu usage, once perform Windows Updates and see if the problem goes away. Sometimes, certain services cause the performance issues that result in this and in that you need to find those services and disable them.

There are other different scenarios possible and depend on that different solutions possible that you have to apply to get the required fix. In this article, we have listed out such solutions. So, if you are dealing with this particular issue, follow the troubleshoot methods mentioned here and these will certainly help you in getting the required fix.

If you do not want to involve in the manual removal processes and want a quick approach, you should use PC Repair Tool, an automatic tool to check for PC related issues to provide their automatic fix. Here is its direct download link provided for you.

Know more about sysmain service high cpu usage

Service Host SysMain or called Superfetch is a bundle of system processes that are supposed to optimize apps launching and speed up their starting. But, sometimes, it causes high disk and CPU usage. Many users have reported receiving the performance issues and slow working process due to that on Windows 10 and 11.

The possible reason that could cause this problem is missing update. So, it is advised to keep your PC up-to-date to avoid such issues. In addition, if this service is causing problem, you might have to disable it. Check below the possible fixes that you should apply:

Fixes for sysmain service high cpu usage

Fix 1: Stop SysMain service

Stopping SysMain services from services can help you in resolving the high disk usage issue caused by the process:

  • Press Win+ R. type in services.msc and hit Enter,
  • In the services window, locate SysMain and double-click on it,
  • Click on Stop button,
  • Finally, click OK to save the changes.

Fix 2: Use Command Prompt

  • Press Win+ S, type in cmd,
  • Right-click on Command Prompt and select Run as Administrator,
  • In the Command Prompt window, type the below command and hit Enter:

sc stop “SysMain” & sc config “SysMain” start=disabled

  • You receive Change Service Config Success on the screen.

Fix 3: Use Registry Editor

  • Press Win+ R, type in regedit and hit Enter,
  • In the Registry Editor, navigate to the below location:


  • Copy-paste the above path in the Registry Editor and on the right pane double click on Start,
  • Enter 4 in the Value Data filed and Click Ok to save the changes,
  • Check now if sysmain service high cpu usage issue is gone.

Fix 4: Check your hard drive

If you are using traditional mechanical hard drive, switch to SSD. This will make a lot of difference in the Windows installation and other frequently accessed programs. Most of the laptops use M.2 slot to install NVMe SSD. If you do not have the one, you should buy a separate caddy to install SSD on your old laptop.

Fix 5: Update Windows

  • Press Win+ I to open Settings,
  • Go to Update & Security,
  • Check for the pending updates and install them.

If you still receive the problem, you should consider of disabling the background intelligent transfer service to stop the service host SysMain from using all disks on Windows. To do that, on the run window, type services.msc and press Enter.

In the opened window, locate and double-click on Background intelligent transfer service, click on Stop and save the changes. If the problem continues, you should consider disabling the service. Disabling ti will not cause any additional problems.


That’s all! We have provided all possible fixes for sysmain service high cpu usage. Hope so, these methods really work. Appreciate our efforts from below the comment section if you find this article informative and useful.