What is MoUSO Core Worker Process, and How to Disable it?

What is MoUSO Core Worker Process and How to Disable it?
TechLatest is supported by readers. We may earn a commission for purchases using our links. Learn more.

If you have ever seen your computer turn on automatically even after you have put it to sleep, then you would have wondered why it happened.


Well, it is most probably due to the MoUSO Core Worker Process that we are going to talk about today in this article. This is a process that runs in the background whenever the system checks for a Windows update or installs it.

If the MoUSO Core Worker Process detects an issue while installing or downloading any update on the system, it can wake your system up. Since Windows 10 version 1903, this process has been added to the system, and you can also check this process running in your task manager while installing an update.

What is MoUSO Core Worker Process and How to Disable it?

What is MoUSO Core Worker Process?

MoUSO Core Worker Process is described as an Update Session Orchestrator or USO, which means that it initiates the process and manages update sessions on Windows. It also manages all the issues that can halt a Windows update, and it keeps Windows safe from any threats during an update.

While the MoUSO Core Worker Process runs in the background, it can use a high amount of RAM or CPU because of some issues caused during the update. When you are downloading or installing an update, these are the exe or DLL files that you might find running in the background:

  • USOCoreWorker.exe
  • USOClient.exe
  • USOapi.dll
  • USOcoreps.dll
  • USOsvc.dll

How to Fix MoUSO Core Worker Process High Memory Usage Issue?

While we are going to tell you how to fix the MoUSO Core Worker Process high memory usage issue, it is worth noting that disabling the MoUSO Core Worker Process is not possible.

The reason is that if you disable this process, you will not get a new Windows update, and it is something that we don’t recommend anyone to do. Therefore, we are going to show you a few ways in which we can fix the MoUSO Core Worker Process High Memory Usage issue.

Download/Install Pending Updates

The first thing you should do whenever you are facing any problems inside Windows is to check if there is any update available or not. If there is any update available for your system, then you should download and install it as soon as possible. Because chances are that your issues are related to your system being outdated, and you need to install the latest update to keep it updated.

  • To check for the latest Windows updates on your PC, go to Settings > Update & Security > Windows update and check if there is any update available or not.
  • If an update is available, click on the Download and Install button to get the newest version of Windows installed on your PC.

Once the Windows update is installed, restart your PC, and your MoUSO Core Worker Process issue will be fixed.


End Background Task

If, for some reason, the MoUSO Core Worker Process issue does not get fixed and it keeps running in the background, then you can end background tasks inside Windows and kill the process manually.

  • To do this, open Task Manager on Windows by clicking the Ctrl + Shift + Esc key combination.
  • Inside the Task Manager, find the MoUSO Core Worker Process running under the Processes tab.
What is MoUSO Core Worker Process and How to Disable it?
  • Click on End Task once the process is found, as seen from the image above.

Restart Update Orchestrator Services

It is quite possible that an issue with the Update Orchestrator Services, which handles the MoUSO Core Worker Process, causes it to do excessive memory usage. For that reason, we are now going to restart the Update Orchestrator Services and see if it fixes the issue or not.

To do this, follow the steps mentioned below:

  • Press Windows + R key simultaneously, type services.msc in the window, and press Enter.
  • Now, double-click on Update Orchestrator Services, and a dialog box named Update Orchestrator Service Properties will open.
  • Inside the window, under the Service Status tab, click on Stop to stop the service from running.
  • Wait for some time and then Start the services again because we don’t want the Windows Updates to be stopped for a long time.
  • Click on Apply and see if your issue is fixed.

Run Windows Update Troubleshooter

Windows gives you an in-built troubleshooter to fix any problems we might face inside the system. It also does a very good job of fixing most of the problems that can occur inside our PC, and that too without us lifting a finger. For the MoUSO Core Worker Process as well, we should run the Windows Update Troubleshooter and see if it can fix the issue:

  • To open the Windows Update Troubleshooter, press Windows + I simultaneously and open Settings.
  • Now, go to Update & Security > Troubleshoot > Additional Troubleshooter and Run the troubleshooter.

Uninstall Recently Installed Updates

Finally, we have seen that even Microsoft’s Engineers are not perfect and can mess something up in the latest updates, as is the case with many Windows updates recently.

Therefore, we can also try and uninstall the recently installed updates to see if the issue is caused by an update that was installed on our system. The process of uninstalling recently installed updates, also known as rolling back, can be done with the following steps:

  • Press the Windows + I key and go to Update & Security > Windows Update > View Update History.
  • Once a new window opens, click on Uninstall Updates at the top, and a new window will open.
  • In this window, go to the Microsoft Windows tab and pick the top-most update which has been installed as it will be the most recent, and double-click on it to roll back this update.
  • Once the update has been uninstalled, restart your PC and check if your MoUSO Core Worker Process issue has been fixed or not.


In this article, we have explained everything there is to know about the MoUSO Core Worker Process and also the reason why it can’t be disabled.

However, we know that the high memory usage issue caused by MoUSO Core Worker Process can be trouble, so we have given you the steps to fix the MoUSO Core Worker Process High Memory Usage issue.


We hope that your MoUSO Core Worker Process problems will be fixed after implementing these steps, but if you are still facing issues, feel free to comment below, and we will help you as best as we can.

Also, share this article with your friends and family members using Windows who are also fed up with this MoUSO Core Worker Process issue.

Leave a Comment
Related Topics
Notify of
Inline Feedbacks
View all comments