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FIX: What Is. NET Runtime Optimization Service

For the best performance of your PC, you need to make sure that your Windows OS is up to date.

.NET Runtime Optimization Service High CPU [Why & Quick Fix]

Find out all you need to know to level out the CPU usage

Windows & Software Expert

Tashreef Shareef is a software developer turned tech writer. He discovered his interest in technology after reading a tech magazine accidentally. Now he writes about everything tech from. read more

Updated on November 25, 2022
Reviewed by 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

  • The .NET Runtime Optimization Service is an important part of Windows that, once it’s done, usually goes away.
  • However, sometimes it can use a lot of CPU power, which will slow down your computer.
  • Check out how to optimize this process in order to stop it from using up your PC resources.

Some Windows OS processes can result in high CPU usage thus slowing down your computer. .NET runtime optimization service high CPU usage issue is among the most reported problems in the Microsoft community forum.

The occurrence of this issue is typically unpredictable, although it may also take place after an update to the .NET Framework has been applied.

If you are also troubled by this issue, here are a couple of troubleshooting tips to help you resolve it. Alternatively, you can opt to use one of the best CPU usage cleaner software to speed up your PC.

What is .NET runtime optimization services?

Windows has a component called NET runtime optimization service, which is also known as mscorsvw.exe.

This component helps your system perform more efficiently by accelerating the launch of applications and programs.

Why does .NET runtime optimization use so much CPU?

There is a possibility that your computer is infected with malicious software that is masquerading as the service itself, or that the service itself has been compromised thus causing the .NET Runtime Optimization Service server 2019 high CPU usage.

Moreover, it might be that the service has become corrupt; thus, you should attempt to restart it. Or, the performance of your computer is noticeably slower than usual; in this scenario, you will need to optimize it completely.

How can I fix .NET runtime optimization service high CPU issue?

In this article

  • Why does .NET runtime optimization use so much CPU?
  • How can I fix .NET runtime optimization service high CPU issue?
  • 1. Optimize the .NET framework process
  • 2. Check for malware infection
  • 3. Restart NVIDIA Telemetry Container
  • 4. Perform a clean boot

1. Optimize the .NET framework process

  1. Press Windows then type cmd and select the Run as administrator option.
  2. In the Command Prompt enter the following command one by one and then hit Enter to execute:
    For 32-bit:
    cd c:Windows\Microsoft.NET\Framework\v4.0.30319
    For 64-bit:
    cd c:Windows\Microsoft.NET\Framework\64v4.0.30319
  3. Next, enter the following command and hit Enter :
    ngen.exe executequeueditems
  4. Close the command prompt and open the Task Manager by pressing Ctrl + Shift + Esc .
  5. Check if the .NET Runtime Optimization Service is still using the CPU at 100.

The above command will help you to optimize the process allowing it to make use of more CPU cores so that it can finish the process faster.

2. Check for malware infection

Expert tip:


Some PC issues are hard to tackle, especially when it comes to missing or corrupted system files and repositories of your Windows.
Be sure to use a dedicated tool, such as Fortect, which will scan and replace your broken files with their fresh versions from its repository.

If your PC is infected with malware or virus, it can slow down your PC by using the CPU resources in the background. If you have an antivirus installed, make sure you run a full scan of your system.

This may take longer than a quick scan, however, it will help you find any malware in your system.

If you don’t have a specialized tool installed, try ESET Internet Security, an excellent malware protection tool that quarantines suspicious files immediately.

When ESET Internet Security detects any malware, click on Removed Selected option to quarantine the suspicious files.

Malicious programs usually hide in plain sight and look like normal system processes while getting a hold of your system’s resources. By performing a complete scan, you can find and remove any infection from your computer.

If you’re looking for the best antivirus solution to protect your Windows 10 PC, check out this list with the best options you have at this moment.

3. Restart NVIDIA Telemetry Container

Note: This step only applies to the computer that has the NVIDIA graphics card installed.

  1. Press Windows Key + R to open Run. Type services.msc and click OK. This will open the Windows Services window.
  2. Locate the NVIDIA Telemetry Container service on the list. Right-click on the service and select Properties.
  3. In the Properties window, under Service status, click on the Stop button. Next, click the Start button to restart the service again.
  4. Make sure the Startup status: is set to Automatic.
  5. Click Apply and OK to save the changes and fix the .NET Runtime Optimization Service high CPU usage after update.

4. Perform a clean boot

  1. Press Windows then enter msconfig and select System Configuration.
  2. Look for the Services tab and select Hide all Microsoft services.
  3. Select Disable all followed by Apply and OK then restart your PC to fix the .NET Runtime Optimization Service high CPU Windows server 2012 r2 usage.

The .NET runtime optimization service is an essential Windows service and mostly goes away once it is done. However, in case it does not go away, you can follow the steps in this article to fix the high CPU usage issue caused by the process in Windows.

For more solutions, check out our guide on how to fix CPU at 100 for no reason.

If you have any other questions or suggestions, don’t hesitate to reach out in the comments section below.

Still experiencing issues?


If the above suggestions have not solved your problem, your computer may experience more severe Windows troubles. We suggest choosing an all-in-one solution like Fortect to fix problems efficiently. After installation, just click the View&Fix button and then press Start Repair.

FIX: What Is mscorsvw.exe? .NET Runtime Optimization Service?

You don’t know what even Microsoft Compiler To Save Work is and is it a part of .NET Runtime Optimization Service?

Recently, users have reported that their apps and programs are taking a lot of time to load, so when they opened the Task Manager they saw that .NET Runtime Optimization Service is using almost 90% of the CPU.

First of all, you don’t need to worry much because you are not alone in this and many users were trying some wrong fixes for mscorsvw exe on Windows 11.

We have compiled a list of the best solutions for you to fix the mscorsvw.exe error.

What is Mscorsvw exe?

Mscorsvw.exe is an executable file and stands for Microsoft Compiler To Save Work.

It was introduced in Windows 8, and can also be found in the latest versions of Windows 10 and 11.

.NET Runtime Optimization Service is a part of mscorsvw.exe and is responsible for making apps and programs run faster that are dependent on it.

Mscorsvw.exe is so important that most of the programs that run on .NET programming use this file.

So, whenever .NET Runtime Optimization Service it’s obvious it would use high CPU and disabling it will lead to malfunctioning of other systems related to Windows OS.

Is Mscorsvw exe a virus?

It’s totally safe as Mscorsvw is a legitimate program digitally signed by Microsoft Corporation.

As it is legitimate but hackers can still attack the program to make changes and carry out their illegal activities through mscorsvw.exe.

What is AddInProcess.exe and How to.

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Moreover, if you are a Windows XP or Windows Vista user and if you see the .NET Runtime Optimization Service process running on your PC then it’s an unwanted program as this file no longer works there.

Also, we can clear our doubt that mscorsvw exe is a virus or not by checking the file location as it should be located in its default file location when it was originally developed.

  1. Press together Ctrl + Shift + Esc keys to open Task Manager.
  2. Go to Details and look for mscorsvw.exe
  3. Also on your right side under the description column make sure its name is correct.
  4. Right-click on it and select Open file location.
  5. If it is located at c:\windows\microsoft.NET\framework

And if it’s not in the given address, then it might be a virus or spyware.

Solution 1: Scan For Virus and Threats

When you download something from a malicious website you may download a virus with it.

Although you have an antivirus installed on your PC still it can’t protect your system 100%.

Also, it can lead to mscorsvw.exe High disk/CPU/Network usage.

So, to overcome the NET Runtime Optimization service CPU in Windows 11 it’s best to scan for viruses using the Windows 11 built-in virus protection software.

  1. Click on the Searchicon
  2. Select Settings
  3. Now click on Privacy & security > Windows Security
  4. Select Virus & threat protection and click on Quick scan
  5. Wait for the scan to finish and it will let you know how to deal with the virus either remove or block it.
  6. Then restart your PC to see mscorsvw.exeHigh CPU is fixed.

Your service host using too much GPU CHECK OUT FIX: Service Host High CPU Usage?

Solution 2: Speed Up .NET Runtime Optimization Service Using Command Prompt

There are various ways to speed up the process which as a result mscorsvw.exe will consume less CPU.

So, this command function will allow .NET Runtime Optimization Service to fasten up the process by using all the cores available on the CPU.

  1. Open Command Prompt as an Administrator, press Windows Key + X
  2. Or, search “Command Prompt” in the Startup menu, then choose Run as administrator
  3. If you have a 32-bit operating system then you need to copy and paste the command below and press Enter after each command.
    • cd C:\Windows\Microsoft.NET\Framework\v4.0.30319
  4. If you have a 64-bit operating system then you need to copy and paste the command below and press Enter
    • d C:\Windows\Microsoft.NET\Framework64\v4.0.30319
  5. Now type the following command and press Enter: ngen.exe executequeueditems

Restart your PC after the process and see if .NET Runtime Optimization Service high CPU usage is solved or not.

Solution 3: Use the Official Script by Microsoft to Fix mscorsvw.exe High CPU Usage

If the above method didn’t help you in mscorsvw.exe high CPU usage

  1. Visit the GitHubofficial script
  2. Right-click on the Raw button and select save link as
  3. Make sure that the file type is a Windows script file
  4. Now execute the file to run it and you can choose a program to run with it by selecting Windows Script Host
  5. And .NET Runtime Optimization Service high CPU will be fixed.

If this solution didn’t help you fix mscorsvw.exe then continue to restarting NVIDIA container services.

Solution 4: Restarting NVIDIA Telemetry Container service

Restarting the service will help sort out any bugs leading to NET Runtime Optimization Service CPU.

So if you want to make the process faster then follow the steps to restart NVIDIA container services:

  1. Press Windows key + R to open the Run window.
  2. Then type services.msc and click OK to enter the service app.
  3. Scroll down and find NVIDIA Telemetry Container and double-click the Services to open its properties
  4. If the service status shows that it’s starting then click on the Stop button.
  5. In the Startup Type section, choose Automatic from the drop-down list.
  6. Click on Apply and then select OK.
  7. Restart your PC and see if the mscorsvw.exe is fixed or not.

Solution 5: Performing a Clean Boot Using MSConfig to Fix mscorsvw.exe

If your task manager is still showing mscorsvw.exe high CPU usage then continue to clean boot your PC.

Clean boot will help you to eliminate the unnecessary applications which are running on the backend.

Also, it will help fix mscorsvw.exe and will replace the corrupted file that is helping in high CPU usage.

And shut down any applications which are conflicting with each other.

  1. Press Windows Button + R Key
  2. The Run Dialogue Box will appear
  3. Type “msconfig“ and press Enter.
  4. The System Configuration window will open
  5. In the General tab uncheck Load system services and Load startup items box as this will only use services issued by Microsoft when your PC will reboot.
  6. Now Select the Service tab and uncheck all the unnecessary service
  7. Only check those who are not using high CPU usage
  8. And your clean boot is done and the unnecessary services are eliminated
  9. After restarting your PC your mscorsvw.exe error on Windows 11 will be fixed.

Solution 6: Update Windows 11 to Fix mscorsvw.exe High CPU Usage

Sometimes your outdated PC is the main cause of the .NET Runtime Optimization Service CPU usage

For the best performance of your PC, you need to make sure that your Windows OS is up to date.

and with new updates, the bugs or errors like mscorsvw.exe and high disk usage will be fixed.

  1. Click on the Windows icon
  2. Click on the Settings icon and a new window will pop up
  3. Select Windows Update from the left menu
  4. The new window will pop up
  5. Then click on Check for updates button.
  6. If there is any update it will start updating the PC
  7. It will take some time to update Windows OS and after that, you can restart your PC.


So, these are the best fixes we could get for you in fixing mscorsvw.exe High CPU Usage in Windows 11 and

Disabling .NET Runtime Optimization Service from your system is not that much of an easy job and also we don’t recommend it to so that’s why we have provided you with the best possible solutions.

It’s best you try all the solutions and if you have any other fix related to the mscorsvw.exe error or any type of question then just let us know in the comment section below.


Is mscorsvw exe a virus?

mscorsvw exe is not a virus unless it replicates itself or harms your computer.

Is it safe to remove Mscorsvw exe?

No, we won’t advise you to remove mscorsvw exe as all the programs won’t load and your PC’s performance would get low leading to lag in services

Where is mscorsvw.exe located?

mscorsvw.exe is allocated in c:\windows\microsoft.NET\framework where it was stored default when developed.

Is mscorsvw.exe causing High Network Usage?

No, mscorsvw.exe is not causing high network usage and you can confirm this by opening your Task Manager’s details section

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