What is MoUSO Core Worker Process? How to Fix Its High CPU and Disk Usage

BY Sourav



Does your computer turn on automatically even while it’s in sleep mode? If so, probably the MoUSO Core Worker Process is responsible for this. It’s a process that automatically runs in the background while checking or installing a Windows update.

The MoUSO Core Worker Process is able to turn on your computer automatically from sleep mode if it finds any problems while installing an update. It can even consume high RAM and CPU usage.

However, if you want to disable this process but don’t know whether it’s safe, this guide will cover everything you need to know. Furthermore, if it’s consuming too much of your resources, we’ll provide solutions to fix it.  

What is the MoUSO Core Worker Process?

MoUSO Core Worker Process is an Update Session Orchestrator (USO) of Microsoft that helps to manage the update sessions of Windows OS. Microsoft included this process from Windows 10 version 1903. 

Managing the update session includes resolving problems that can interrupt the Windows update process. It also keeps Windows safe from any threats while performing an update.

MoUSO Core Worker Process automatically gets activated in the background whenever Windows checks for updates. It usually doesn’t affect any other process that is currently running.

However, sometimes it remains active for a long without any valid reason, which causes high CPU or RAM consumption of your device. As a result, it wakes up your system from sleep mode and might make it slow.

Is the MoUSO Core Worker Process a Malware?

MoUSO Core Worker Process is a completely safe program made by Microsoft. It comes with Windows when you install it on your device. This means you don’t need to worry that this program will harm your system. 

However, as the program uses excessive CPU or disk space, it could cause harm if you allow the process to run for a long time. According to some users, it might harm your SSD drive in extreme cases. 

How to Fix MoUSO Core Worker Process High CPU Usage or Disk

There are a few things you can consider if the MoUSO Core Worker Process is consuming your resources. Although it’s not possible to remove the process itself, you can fix some problems that may be causing high CPU usage, disk, or memory. 

1. Install Pending Updates

First, you must try to install the pending updates that are on the schedule for your device. 

1. Click the Windows icon at the bottom-left corner of the screen to bring the Start menu.

2. Select Settings. You can also press Windows+I.

3. Click on Update & Security. Here you will be able to find all your Windows updates settings and choose a time to get updates.

4. While staying on the windows update tab, click on check for updates.


5. Windows will now find all the available updates and show you the list of updates that you need to download. 

6. Once the download is complete, click on Install and wait until windows apply all the necessary updates to the device.

2. Check the Authenticity of the Process

It’s important to ensure that the MoUSO Core Worker Process executable file is from Microsoft rather than any Trojan installed by cybercriminals. Most of the time, the hackers use the same name as the original program. As a result, it becomes hard to identify them. 

Here are the steps to check the authenticity of the process:

1. Right-click on the start button and select Task Manager.

2. Right-click on the MoUSO Core Worker Process and choose Properties.

3. Under the General tab copy the path beside Location.

4. Now, paste the path into the File Explorer address bar. 

5. Look for the executable file for the process. 

6. Right-click on it and choose Properties.

7. Finally, go to the Details tab and ensure that Microsoft Corporation. All rights reserved” is written beside Copyright.

3. Run Windows Update Troubleshooter

The best thing about Windows 10 is it comes with a set of troubleshooting tools that you can use to solve problems without seeking help from IT professionals. Although they are not exhaustive, but can at least help you diagnose problems in your system. Therefore, try running the windows update troubleshooter to fix MoUSO Core Worker Process issues. 

1. Click on the magnifying glass icon in your taskbar to open the search bar. You can also press the keyboard shortcut Windows+S.

2. In the search box, type Control Panel. Click on it from the search results to launch the application.

3. Now, use the input field located at the top right to search Troubleshoot.

4. Click on Troubleshooting from the search results.

5. From the left pane, click on View all. This will take you to a new page with all the available troubleshooting options.

6. Move down until you find the Windows Update troubleshooter. Click on it and wait for Windows to launch it in a new window.

7. Click Next to start the Windows Update problem analysis. If the trouble-shooter successfully diagnoses the problem, it will automatically try to fix the problem. At the end of the whole process, you will be able to see a report of it.

4. Disable Delivery Optimization

Delivery Optimization lets Windows users download the latest updates from different PCs on the same network. It helps users to access the latest updates more easily. However, as Windows updates are managed by the MoUSO Core Worker Process, the additional load of downloaded updates from other systems could make the process highly time-consuming.   

So, follow the steps to disable Delivery Optimization:

1. Click on the Windows Start button and click Settings.

2. Click on Update & Security.

3. Go to Advanced Options and click Delivery Optimization from the bottom.

4. Now, turn off the toggle switch beside Allow downloads from other PCs if it’s on.

5. Restart Windows Update Service

If your device is not going into sleep mode and you have already verified MoUSO Core Worker Process is the reason,  just restart your Windows Update service to resolve the problem.

1. Press f Windows+R on the keyboard to open Run.

2. Type in services.msc and click OK. It will launch Services in a new window.

3. Scroll down and located Windows Update in the Services list. 

4. Now, right-click on it and click Restart. This will restart the update process that was initially put to an end.

5. Once the process is completed, restart your system.

6. Restore Windows Power Settings to Default

If your computer keeps waking up from sleeping mode regularly, it could be MoUSO Core Worker Process that is causing the trouble. To solve the issue, restore the power settings to the default settings.

1. Press Windows+S to open the search interface. Alternatively, click the magnifying glass icon in the taskbar.

2. Type “PowerShell” in the search field and right-click on Application in the search results. 

3. Click Run as Administrator from the drop-box menu. 

4. Click Yes, when prompted by User Account Control. It allows the application to launch with administrative permissions.

5. In the Windows Powershell window, type powercfg -restoredefaultschemes and press Enter.

6. Now, you just need to wait for the command to finish the task. Once done, you have to restart your device to check if the fix is working.

7. Disable Update Orchestrator Service

The MoUSO Core Worker Process needs the Update Orchestrator Service to function properly. So, disabling the service will help to stop the MoUSO Core Worker Process. Here are the steps:

1. Press Windows+R to open Run

2. Type services.msc and click Ok.

3. In the Service window, find out the Update Orchestrator Service.

4. Right-click on it and click Properties.

5. Under the General tab, click on the dropdown arrow beside the Startup type and select Disabled

6. Once done, click Apply and Ok.

Disabling the Update Orchestrator Service must stop the MoUSO Core Worker Process. But if it doesn’t work, you can end the service from Task Manager. 

Final Words

Hopefully, this guide will help to provide a clear idea of the MoUSO Core Worker Process. Also, if your computer’s CPU, memory, or disk consumption suddenly surges due to this operation, you can fix it using the methods mentioned in this article.

About The Author


Sourav’s been working as a freelance writer and blogger for over five years. She is a firm believer in big dreams and realizing them. Her work has been published in Women On Writing, Be a Freelance Blogger, Make a Living Writing and Brazen Careerist among others