How to Resolve High CPU and Memory Usage by Csrss.Exe in Windows Computers

  • The problem can be caused by a corrupt user profile or a virus or malware with the same name (csrss.exe) as a legitimate Windows system process.
  • Csrss.exe is a process called Client Server Runtime Process that is almost eating up your CPU.
  • It is recommended that you back up your Documents and Desktop files, and then click Delete files to delete the current user profile and log in to a new user account.
  • Delete the default account and save your changes.

Updated March 2024This tool will stop these errors and fix common problems: Get it at this link
  1. Download and install the software.
  2. It will scan your computer to find problems.
  3. The tool will then correct the issues that were discovered.

What Is Csrss.exe In Task Manager

csrss.exe is a process which is registered as a trojan. “This Trojan allows attackers to access your computer from remote locations, stealing passwords, Internet banking and personal data. ” This process is a security risk and should be removed from your system.

Non-system processes like csrss.exe originate from software you installed on your system. Since most applications store data on your hard disk and in your system’s registry, it is likely that your computer has suffered fragmentation and accumulated invalid entries which can affect your PC’s performance.

Csrss Exe What Is It

A legitimate and important process within Windows Operating Systems is crss.exe (also known as Client Service Runtime Process). Since csrss.exe is a critical part of the operating system, you should see it running in Task Manager if it is located in “C:/Windows/System32/”.

Csrss.exe Windows 7

It performs some essential functions both in the background and directly as part of Windows. If you use Windows 10, Windows 8, or Windows 7, you won’t directly interact with csrss.exe, but it shows up in Task Manager as Client Server Runtime Process.

The built-in antimalware tool, Windows Defender, will help you if a virus is causing high CPU usage in Windows 10 because of csrss.exe.

Your computer starts to run slowly without warning. You will notice a process called Client Server Runtime Process that is almost eating up all of your CPU if you look in Task Manager to see which applications are causing your computer to freeze.

What Is Csrss Exe In Task Manager

As part of the Windows operating system, the csrss.exe process plays a crucial role. The csrss.exe program was responsible for managing the entire graphical subsystem before Windows NT 4.0 was released in 1996, including drawing things on the screen, managing windows, and other system functions.

This process (csrss.exe) is essential for the smooth operation of the Windows Operating System. It performs the shutdown of the Windows 32 console as well as GUI in the current version of the operating system. Windows users have experienced csrss.exe suddenly using almost all of the CPU and RAM, resulting in either a complete failure or an unusable slowness of the system.

Speaking of csrss.exe, this process definitely produces an extremely negative impact on performance of your computer due to consumption of many system resources and causing high CPU usage on a regular basis. When you locate csrss.exe process via your Task Manager you may right-click on it and select the option to open file location, which will straight lead you to the csrss.exe folder related to it. However, most likely you will not be able to delete all its components because the adware will be protected by a lot of other similar processes and services running in the background.

Many users want to disable csrss.exe in Windows 10 because it causes problems in Task Manager. However, this process is vital to the health of your PC, so you shouldn’t disable it.

What causes high CPU and memory usage of csrss.exe?

Csrss.exe Windows 10

Under Client Server Runtime Process in the Task Manager, you will find csrss.exe in Windows 10. The process used to appear in Task Manager under its application name (“csrss.exe”). You can inspect the process by right-clicking on it. The following options are helpful for inspecting it:

CSRS.exe is a legitimate Windows system process with the same name as a virus or malware.

A corrupt user profile and viruses or malware can both cause this problem, but you can take action regardless of which of these two causes you have (csrss.exe) on your system.

How to fix the high CPU and memory load of Csrss.exe?

Updated: March 2024

We highly recommend that you use this tool for your error. Furthermore, this tool detects and removes common computer errors, protects you from loss of files, malware, and hardware failures, and optimizes your device for maximum performance. This software will help you fix your PC problems and prevent others from happening again:

  • Step 1 : Install PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista).
  • Step 2 : Click Start Scan to find out what issues are causing PC problems.
  • Step 3 : Click on Repair All to correct all issues.


Csrss Exe Windows 7

On Windows Operating Systems (OSes), crss.exe (also called Client Service Runtime Process) is a legitimate process. Because it is an important part of the operating system, it is normal to see it in the Task Manager. However, malware uses csrss.exe to hide its process from users in some cases. To determine if csrss.exe is legitimate or malicious (follow the steps above), you need to take some steps.

Utilize Windows Defender

  1. Open Windows Defender from the system tray.
  2. Virus and threat protection can be found by clicking on the Protect button.
  3. Scan in advanced mode.
  4. A standalone scan will be performed by Windows Defender.
  5. Click Scan now.

Remove the current user profile

  1. The Control Panel can be accessed by typing Control into the Windows search bar.
  2. Create a user account.
  3. You can select user accounts by clicking on them.
  4. To manage another account, click the Manage button.
  5. To add a new user, go to PC settings.
  6. This PC can be shared with another person by selecting the Add a second user option.
  7. Then return to Edit Account and log in to the other user profile.
  8. Click Change Account Type in the newly created account.
  9. The role should be administrative.
  10. You should back up both your Desktop and Documents. Select your current profile and select it from the menu.
  11. Next, click Delete files, followed by Delete account.
  12. Your new account will be ready once you log in.
  13. To display advanced system options, type Advanced options in the Windows search bar.
  14. Click on Advanced.
  15. To change your user profile settings, click Settings.
  16. Don’t forget to save your changes after you delete the default account.
  17. Go to Task Manager and check how much CPU is being used by csrss.exe after restarting your PC.

RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

  1. Restore your computer to the last restore point, snapshot or backup image before the error occurred.
  2. Run System File Checker (SFC) to restore corrupt or missing csrss.exe file.
  3. Perform a Windows update.

All of your computer's memory is related to the processor and RAM. However, the problem of high memory usage is mainly due to the overloading of many internal processes. Therefore, it is useful to stop unnecessary programs and running applications. Open the Task Manager and check all unnecessary programs that you are not using at the moment.

There should be one instance of csrss.exe for system processes and another instance for interactive logins. If there are multiple users logged in, there may even be multiple instances of crss.exe in the Task Manager. The "one csrss.exe" rule applies to XP and earlier versions.

Website | + posts

Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.