How to Fix Service Host SysMain on Windows?

Fix Service Host SysMain on Windows – Service Host SysMain earlier known as Superfetch is a bundle of system processes. You are most likely wondering how it works.

Fix Service Host SysMain on Windows

This processes package is supposed to optimize the apps launching and speed up their starting but sometimes it can do quite the opposite, causing high disk and CPU usage.

What causes SysMain High Disk Usage?

Have you ever wondered why is Service Host Sysmain causing high disk usage? Missing updates are the most common cause for this problem, so it’s advised to keep your PC up to date to avoid such issues.

In addition, if this service is causing problems, you might want to try disabling it. Other Sysmain issues include:

  • 100% disk usage
  • High disk activity
  • High CPU usage

How to Fix SysMain High CPU Usage on Windows 10?

Service Host SysMain is a bundle of system processes that includes different processes. If you face problems due to this file like slow performance or system heat up, follow these fixes.

Stop SysMain Service

To disable SysMain Service from running, follow the steps below:

1. Press Windows + R

2. In the Run window type services. msc and press Enter

3. Look for SysMain service.

4. Right-click > Properties

5. Here click, the downward arrow next to Startup and select Disabled > Stop > Apply > Ok

6. Press Ctrl+Shift+Del and open Task Manager.

7. Look for SysMain service; it should no longer be consuming resources.

However, if the issue persists, move to the next solution.

Fix Service Host SysMain on Windows – Run SFC ScanNow Command

When system files get corrupt, you might face issues with the service host local system file. To fix it, we need to check and repair corrupted system files. To do so, follow the steps below:

1. Press Windows + X

2. Select Windows PowerShell (Admin)

3. Type SFC /scannow and hit Enter

4. Wait for the process to run. If any corrupt files are detected, they will be repaired.

5. Now, check the Task Manager for the service Host SysMain CPU problem.

Fix Service Host SysMain on Windows – Disable Service Host Local

1. Press Ctrl+Shift+Esc.

2. Click the Processes tab.

3. Scroll down to look Service that is consuming the most CPU power.

4. Right-click > End task.

5. Restart the system and see if the High CPU problem is resolved or not.

These are different ways to fix service Host SysMain High CPU Usage.

Disable Background Intelligent Transfer

1. In the Windows Run window type msconfig > Enter.

2. Click the Services tab and look for Background Intelligent Transfer Service.

3. Select and uncheck the box next to it.

4. Click Apply > Ok.

Disable SysMain via Command Prompt

1. In the Windows search bar, type Command Prompt

2. Select the search result > right-click > Run as administrator

3. Here type the following command: sc stop “SysMain” & sc config “SysMain” start=disabled

4. After it is successfully processed, you will get Change Service Config Success, message.

5. Exit Command Prompt and open Task Manager to check disk usage

You should no longer see 100% CPU usage caused due to Service Host SysMain.

Fix Service Host SysMain on Windows – Modify SysMain via Registry Editor

To resolve service Host SysMain’s high CPU usage, we suggest modifying the registry entry. To do so, follow the steps below:

1. Press Windows + R

2. Type Regedit in the Run window

3. Here navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMain

4. Look for the Start key in the right pane.

5. Right-click > Modify

6. Change the Value data from 2 to 4 and click Ok to save changes.

7. Exit registry editor and head to Task Manager to check if the high disk usage issue is resolved or not.

Update Windows

Updating Windows also helps fix high disk usage issues. Hence, we suggest downloading and installing the latest updates. To do so, follow the steps below:

1. In the Windows search bar, type Windows update

2. Click Check for updates

3. Wait for Windows to look for updates.

Note: You need to connect to the internet to update Windows

4. If any updates are detected, download and install the update.

Now, check the Task Manager, the SysMain causing high disk usage should be resolved.

5. Restart the system and check if the issue is resolved or not.

Disable Automatic Updates

  1. Press on Windows key + R to open the run command.
  2. Type services. msc.
  3. Right-click on windows update and select properties.
  4. Click on Startup type and select disabled.
  5. Click OK and restart your computer.

Disable the SysMain service using the Service Manager

Another way to completely kill the process associated with SysMain that is causing high CPU and high disk and memory usage in Windows is to disable the SysMain service from the service manager.

  1. Press Win+R on your keyboard to open the Run window. Next, type the command services. msc.
  2. Hit Enter to open the Service Manager window. Scroll down to the SysMain service.
  3. Right-click on the SysMain service, select Properties, and then change the Startup Type to Disabled.
  4. Click Apply and then click OK.

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