mscorsvw.exe .net Runtime Optimization Service

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You may never notice the .net Runtime Optimization Service if you do not open task manager. By the way, what is .net Runtime Optimization Service? In fact, the .net Runtime Optimization Service is also called as Mscorsvw.exe. It is a component of Windows which is used to optimize your machine to launch apps and program faster.


Usually, the Mscorsvw.exe or .net Runtime Optimization Service will not be able to cause high CPU. However, if the optimization process takes too long, it can cause high CPU usage. The official answer is that the process requires recompiling its libraries and that it must only run when the computer is idle. Also, Microsoft states that the process should not take more than a couple of minutes. In the text below, we have summarized some reasons for the .net Runtime Optimization Service high CPU usage. Here are some causes:

  • It is usually running slow and you are able to try to speed it up by running certain commands.
  • Your computer may be running malware camouflaged as a service, or the service may be infected. In this case, you are able to try running a malware scanner. In some cases, if there is malware, the AntiMalware service may also be consuming high resources.
  • The .net Runtime Optimization Service may be corrupted and you should try restarting it.



We do not suggest you end this process immediately as it will actually help your computer and the way apps and games are run. But, there are some ways you can speed up the process by running this helpful command or by running a script for the same effect. This must enable the process to use more CPU cores that will enable it to finish running more quickly. Let us check it out below.

  • Please search for Command Prompt by clicking the search button right next to it. Right-click on the first result that appears at the top and select the “Run as administrator” option.
  • The users who are using an older version of Windows are able to use the Windows Logo Key + R key combination in order to bring up the Run dialog box. Please type in “cmd” in the box and use the Ctrl + Shift + Enter key combination in order to run Command Prompt as an administrator.
  • Now, you have to copy and paste the commands and ensure you click the Enter key on your keyboard after each one. Among the first two commands, select the one according to your operating system.
  • Lastly, check to see if the CPU usage of the .net Runtime Optimization Service has gone back to normal.


Restarting the service will be able to restart the whole process as well, however it should complete more quickly now, especially if a bug was causing it to misbehave. Follow these steps:

  • Firstly, you have to open the Run utility by using the Windows Key + R key combination on your keyboard. Then, type “services.msc” in the newly opened box without the quotation marks. Click OK to open the Services tool.

  • After that, locate the NVIDIA Telemetry Container service on the list. Right-click on it and choose Properties from the context menu that appears.

  • If the service is started (you will be able to check that just next to the Service status message), you have to stop it by clicking the Stop button in the middle of the window. Please run it again by clicking the Start.
  • Ensure that the option under the Startup type menu in the service’s properties window is set to Automatic before you proceed with other steps. Do not forget to confirm any dialogue boxes that may appear once changing the startup type


As we explained above, malware infection can lead to the .net Runtime Optimization Service high CPU. If you have this issue, you are able to run anti-malware software such as Malwarebytes and Avast to perform a full scan. Both of them are able to be downloaded from their official site. Here, we are going to show you how to scan your PC with Malwarebytes. For your information, Malwarebytes is an amazing anti-malware tool that you can download from their official site. Hopefully, you will not need the full suite after you solve this issue, so ensure you download the trial version. Continue to the following steps:

  • Locate the executable file you just downloaded from their site in the Downloads folder on your PC. Then, double-click on it in order to open it on your computer.
  • Choose where you want to install Malwarebytes and follow the installation instructions that will appear on the screen in order to complete the installation process.
  • Now, you have to open Malwarebytes by locating it in the Start menu or on your Desktop. Choose the Scan option available at the home screen of the application.
  • The tool is going to probably launch its updating process in order to update its virus database and then it will be able to proceed with the scan. Please be patient until the process finishes that might definitely take a while. If malware is detected on your computer, you need to confirm to have it deleted or quarantined.
  • The last step, you are able to restart your computer after the scanning process is over and check to see if you still experience issues with the .net Runtime Optimization Service.

For note: You should also use other security scanners if you are able to tell the type of malware you have on your computer (junkware, ransomware, etc.). Aside from that, a single scanner will never be able to recognize and delete all types of malware, so we suggest you try other ones.

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