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

Without warning, you notice that your computer is running slowly. If you can’t help but look in Task Manager to see which applications are causing your computer to freeze, you will find that there is a process called Client Server Runtime Process that is almost eating up your CPU.

Even worse, sometimes you see two or more csrss.exe processes running in Task Manager. Faced with this annoying problem, many users prefer to disable csrss.exe in Windows 10. But what you don’t know is that this process is important for your PC.

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

This problem can be caused by one of two things: a corrupt user profile or a virus or malware with the same name (csrss.exe) as a legitimate Windows system process. Regardless of which of these two reasons you have, you can do something about the problem anyway.

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

Utilize Windows Defender

  1. Open Windows Defender from the system tray.
  2. Click Protect against viruses and threats.
  3. Click Advanced scan.
  4. Select Windows Defender standalone scan.
  5. Click Scan now.

Remove the current user profile

  1. In the Windows search bar, type Control and open the Control Panel.
  2. Open User Accounts.
  3. Select User Accounts.
  4. Click Manage another account.
  5. In PC settings, click Add new user.
  6. Select Add another person to this PC.
  7. Enter the login information for the other user profile and return to Edit Account.
  8. Open the account you just created and click Change Account Type.
  9. Give it an administrative role.
  10. Now go back and select your current profile. It is recommended that you back up your Documents and Desktop files.
  11. Click Delete account, and then click Delete files.
  12. Log out and log in to your new user account.
  13. In the Windows search bar, type Advanced options, and then select Show advanced system options.
  14. Select the Advanced tab.
  15. Click Settings under User Profiles.
  16. Delete the default account and save your changes.
  17. Restart your computer, log in with your new user profile and go to Task Manager to check csrss.exe CPU usage.

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.