MoUSO Core Worker Process: What is It & How to Fix Its High CPU?

A software component that decides the order of download and install of Windows update

by Vlad Turiceanu
Vlad Turiceanu
Vlad Turiceanu
Passionate about technology, Windows, and everything that has a power button, he spent most of his time developing new skills and learning more about the tech world. Coming... read more
Reviewed by Alex Serban
Alex Serban
Alex Serban
Windows Server & Networking Expert
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server... read more
Affiliate Disclosure
  • MoUSO core worker process is an essential software component responsible for improving your computer's performance and stability.
  • This guide will explain this process and the ways to reduce high CPU usage caused by it.
mouso core worker process

To fix various PC problems, we recommend Restoro PC Repair Tool:
This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues and remove viruses now in 3 easy steps:

  1. Download Restoro PC Repair Tool that comes with Patented Technologies (patent available here).
  2. Click Start Scan to find Windows issues that could be causing PC problems.
  3. Click Repair All to fix issues affecting your computer's security and performance
  • Restoro has been downloaded by 0 readers this month.

Noticed the MoUSO core worker process causing high disk usage, high RAM consumption, and CPU usage? If you are wondering whether it is a legit process, then you are at the right place.

Here, in this guide, we will discuss what the MoUSO core worker process is and how to reduce disk and CPU usage due to it. Let’s begin!

What is the MoUSO core worker process?

MoUSO is a software component of Microsoft’s Unified Update Platform. It manages the order in which updates are downloaded and installed on Windows.

This process appears in Task Manager whenever Windows check for updates. However, sometimes it might remain active for a long time without any reason, which causes high CPU and RAM consumption, resulting in slow and sluggish PC performance.

How to fix MoUSO core worker process high Disk/CPU Usage?

Before diving into advanced troubleshooting, you should consider performing the following steps:

1. Verify if the process is genuine

  1. Press Ctrl + Shift + Esc to open Task Manager.
  2. Right-click on the process and select Properties.Properties mouso core worker process
  3. On the Details tab, check next to Copyright; it should say Microsoft Corporation. All rights reserved.Copyright

2. End the MoUSO core worker process

  1. Press Ctrl + Shift + Esc to open Task Manager.
  2. Right-click on the process and select End Task.End task
  3. Restart your computer.

3. Run the Windows Update Troubleshooter

  1. Press Windows + I to open Settings.
  2. Go to System, then select Troubleshoot.System troubleshoot-mouso core worker process
  3. Now click Other troubleshooters.Other Troubleshooters
  4. On the next window, click Run next to Windows Update.Windows Update Run
  5. Follow the on-screen instructions to complete the process.

4. Disable Delivery Optimization

  1. Press Windows + I to get Settings.
  2. Go to Windows Update, then click Advanced options.Windows Updates -mouso core worker process
  3. Under Additional options, click Delivery Optimization.Additional options
  4. Turn off the toggle next to Allow downloads for other PCs.

5. Disable & Restart Services

  1. Press Windows + R to open the Run window.Servicesmsc
  2. Type services.msc and press Enter to open Services.
  3. Locate and right-click  Windows Update. Select Restart.Restart Windows Update service -mouso core worker process
  4. Now look for Update Orchestrator Service, and double-click it.
  5. In the next window, select Disabled from the drop-down next to the Startup type.Disabled
  6. Click Apply and OK.

6. Reset Power settings

  1. Press the Windows key, type PowerShell, and click Run as administrator.Powershell
  2. Copy and paste the following command and press Enter:  powercfg -restoredefaultschemesPowerShell command -mouso core worker process
  3. Wait for the process to finish, and then restart your PC.

Is MoUSO core worker process a virus?

MoUSO is a genuine Windows process. However, if it seems to be CPU-intensive, then you can authenticate it using the first method. Also, you can open this executable file’s location and check if it is in the Windows folder on your C drive. If the file is located somewhere else, it might not be legit, and you need to run a deep scan on the security tool to eliminate the problem.

Can I End task MoUSO core worker process?

Yes, you can end task for the MoUSO core worker process from Task Manager. You can right-click on it and select End Task to close the process.

So, this is it! This is all you need to know about the MoUSO core worker process, along with the fixes to get rid of high CPU and high disk usage caused by the process. 

Try these methods to fix the issue, and let us know what worked for you in the comments section below.

Still having issues? Fix them with this tool:


If the advices above haven't solved your issue, your PC may experience deeper Windows problems. We recommend downloading this PC Repair tool (rated Great on to easily address them. After installation, simply click the Start Scan button and then press on Repair All.

This article covers:Topics: