4 Fixes: High CPU Usage by .NET Runtime Optimization Service

High CPU Usage by .NET Runtime Optimization Service

The major reason behind the High CPU Usage by .NET Runtime Optimization Service error to use a high CPU on your PC is possible if the related process mscorsvw.exe is precompiling .NET assemblies in the background. Once everything is done, it will go away. 

Other potential causes can be: .NET Runtime Optimization running slow, Conflicting program or malware running on your PC or Corrupt .NET Runtime Optimization. 

Fixes For High CPU Usage by .NET Runtime Optimization Service: 

  1. Scan your computer for Malware infections
  2. Optimizing the process
  3. Restarting the Service
  4. Performing a Clean Boot

Make sure to thoroughly review them and pick the solution to your issue accordingly.

1. Scan your computer for Malware

This might sound a little over the top; nevertheless, malware injections are known to be one of the biggest and the leading causes of this issue.

Plenty of malicious programs are motivated to get a hold of all the resources in your device by naming their processes as something that would resemble the files on your local computer.

Down below are the steps to scan your PC with an Anti Malware software

  1. Download any Anti-Malware Software of your preference and choice. You may browse many windows security anti-malware software online. It is advised to look for antivirus software that has a vast database. Remember to download the software from their official website. 
  2. After downloading the antivirus software, you need to locate the executable file from the Downloads folder on your PC. Then you need to double-click on that downloaded file to open it on your computer. 
  3. The next step is to select the location on your desktop where you want to install the application. A bunch of installation guidelines and instructions will appear on the screen, asking you to follow and confirm them to complete the installation process.
  4. Once the process is done, you need to locate the antivirus software in the start menu or on the desktop wherever you have saved it.
  5. Open the software and click on the Scan option, which might be visible on the application’s Home Screen.
  6. Then the application will launch its updating process to have its virus database updated. Once it is updated, it will proceed with the scan.
  7. It is advised to be consistent and patient until the process finishes which will take a good amount of time.
  8. If malware is detected on your device, you may allow the software to delete or quarantine them.
  9. After the scanning process is done, you may restart or reboot your computer.
  10. After your device turns on, you may check if the issue persists with the .NET Runtime Optimization Service.

2. Optimising the process

It is advised not to end this process promptly as it genuinely helps your computer and the way all the apps and software are running.

However, there are plenty of ways to speed up the process by simply running a few helpful commands or executing an official script that is the windows script host from the windows script file for the same result. This allows the process to use up more CPU resource cores, which can finish the run process more quickly.

The steps are given below:

1. Open the start menu and either type and search for. “Command Prompt” or tap the search button right next to it. Right-click on the first result that appears at the top.

location of the command prompt

2. Click on the “Run as administrator” option from the drop-down list.

location of run as administrator option

3. Users using the older version of Windows can press the combination of the Windows Logo key and the R key to bring up the Run Dialog box.

4. Then type in “cmd” in the box and press the combination of the Ctrl+ Shift+ Enter key to allow the run command prompt to run as an administrator.

5. Copy and paste the command mentioned below:

list of commands

6. Then click the Enter Key on your keyboard after each one.

7. From the first two commands mentioned above, you need to pick one according to the type of your operating system. (For your information, the “cd” command stands for “change directory (to).”)

8. Type the first line command for computers of 32-bit and the second line command for computers of 64-bit

9. Now, you may execute the ngen.exe tool by typing the below-mentioned command: ngen.exe executequeueditems

10. If, by any chance, you are prompted with any “ngen.exe not found” error message, then you may download and install the latest version of Microsoft Framework64 applicable to your device’s OS version.

11. If doing so helps, you might notice a decrease in CPU usage in the Task Manager window.

After trying out all the fixes mentioned above, you may check to see if the CPU usage of the .NET Runtime Optimization Service has returned to normal.

3. Restarting the Service

The process of Restarting the service will restart the whole procedure. In case a bug has been causing issues, it should complete the process quicker than normal. 

Read down below to know more:

1. Open the Run utility window by pressing the combination of the Windowsmicrosoft Key and the R key on your keyboard simultaneously.

2. In the Run utility box, type “services.msc” without quotation marks.

location of the blank space to type in

3. After that, click OK, and the Services tool window will open.

4. Look for the NVIDIA Telemetry Container service option from the list and right-click on it.

5. A drop-down menu option will appear. Click on the properties option. 

6. If the service has already started (you can check that under the general tab, just next to the Service status message), you may click on the Stop button below the Service Status message.

7. You may run the service again by clicking on the Start option.

8. Before you proceed with other steps, check if the option under the Startup type menu in the Service’s properties window is set to the Automatic option. 

9. You may be prompted with a few dialogue e boxes on the screen while changing the startup type. Confirm them all to allow the service to run smoothly.

4. Performing a Clean Boot

In a few cases, a third-party app might be the reason behind the high CPU usage due to required optimization. Therefore this solution is to apply for a clean boot to scan and check if there is any third-party influence on the service. 

Initiating a clean boot helps in checking if the CPU usage is as high as it was previously. 

1. In the search bar beside the windows start icon, type in and launch “msconfig

screenshot of all the options in the search results

2. The System Configuration window will open. Click on the Services tab.

location of the services tab and the other options

3. Tick the checkbox for “Hide all Microsoft services” at the bottom of the window. Doing so will leave only the third-party services on the list.

4. Now click on the “Disable All” option to disable all of them.

5. If any dialogue box asks permission to reboot the system, you may refuse it and restart your system later.

6. Now, guide yourself to the Task Manager by right-clicking on the taskbar. You may as well launch the msconfig.exe again, click on the startup tab and tap on “Open Task Manager.” Or you may even search for Task Manager in the Search Box.

location for task manager option

7. In the Task Manager window, look for apps labeled as “high impact” in the StartUp Impact column and turn them off by right-clicking them.

8. Now, you may perform the Reboot for your device.

If it isn’t causing any such issues, then it implies that there was a third-party influence that has been causing such an issue. Now you can easily troubleshoot the reason or, as you may say, the culprit behind this problem.

Wrapping Up

Hopefully, applying any of the above fixes explained in this post has fixed the High CPU Usage by .NET Runtime Optimization Service issue on your Windows PC. 

If anyhow, the same issue comes back to haunt you or your device later, you may check for available pending Windows os software updates or maybe reinstall the latest version of the .NET framework.


What exactly is the .NET runtime optimization service?

.NET is a support runtime and framework for operating ‘common language runtime’ applications. In other words, you can say that it helps apps to operate, which are originally written in C#, VB, and F#, such as Windows Power shell or Visual Studio.
Runtime optimization: This is only really required for .NET apps because they aren’t written in ‘machine code’; they are written in ‘common intermediate language,’ which needs to be compiled to machine code during runtime’s easier for the computer to understand it.
If the optimization service does it ahead of time, your apps might skip the compile process step (JIT) and start the process faster than expected.

What exactly is .NET? Is it a library, a compiler, a framework, or a runtime?

.NET is a virtual machine platform designed and written by Microsoft. It has a useful feature and complete standard library that enables the user to use it to make most of the business-related desktop and web applications.

What are the runtime services in .NET?

.NET provides a run time environment known as the common language runtime. This runs the code and offers services that make the development process easier for its users. Compilers and tools expose most of the common language runtime’s functionality and enable the users to write codes that indefinitely benefit from this managed execution environment.

Is .Net Core run-time never optimized for non-server applications?

Universal Windows apps use .net core, which is already optimized for non-server applications.
Besides, nothing like “runtime optimization specific for servers“ actually exists.