Conhost.exe high CPU usage on Windows 10 [SOLVED]

The latest Windows 10 build has fixed the high CPU usage error that several users encounter while using conhost.exe.

What is Conhost.exe?

Console Window Host process or the Conhost.exe is a system level service. This service, known as ClientService Runtime System Service in the days of Windows XP, is one of the crucial system files and should not be removed or modified as it would inevitably result in system errors.

What error may occur by using Conhost.exe?

Malware developers often name their virus files after conhost.exe since users would not remove it thinking that this is an essential service. However, if you notice multiple conhost.exe files in your task manager you should immediately run a scan in your antivirus software in order to detect potential malware. As for the authentic conhost.exe file, the error commonly encountered with it is that it results in high CPU usage. Using some of the fonts of the ‘Command Prompt’ with the conhost.exe file is believed to be the cause of the high CPU usage error.

How to resolve Conhost.exe High CPU Usage

The new Windows 10 build 15019 resolves a whole range of issues, one of the most prominent of these being the high CPU usage error associated with running the conhost.exe file. The high CPU usage may create a lag or slow down the computer to an extent where users may no longer be able to continue to use the computer as per normal. This is an error that Windows users have been struggling with for a long time, but to their relief, the latest Windows update has finally fixed this issue. Below is the procedure for installing the update if you have not done so already.

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Install latest Windows Updates.

  1. Press the Windows key + I to open the Settings application.
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  2. Click on Update & Security and select the Check for Updates option.
  3. The available updates will start installing once the system has completed scanning and downloading them.

If the update does not resolve the issue, you can try the below troubleshooting methods to fix the conhost.exe high CPU usage.

Check if there are Faulty Drivers

  1. Go to the Windows start menu icon and right click on it.
  2. Next, choose the Device Manager option.
  3. Explore the entire list of devices closely to see if any of them have a yellow exclamation mark next to them (the exclamation mark indicates that the device driver is malfunctioning).
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  4. If you find a malfunctioning device drive, right click on it and click the Update Driver Software option from the list.
  5. Once the update is complete, reboot the system.

Perform a Clean Boot

One cause of the conhost.exe high CPU usage error may be using up the CPU resources due to interference by third-party software. The best way to verify if this is the issue is to perform a Clean Boot. If the Clean Boot fixes the problem you can re-enable all the third-party software one at a time to single out the application that is causing the error. Once you find the third-party software that has resulted in the problem, you could try reinstalling it or simply delete it from your device. Below is the procedure for performing this solution:

  1. Press the Windows + R key and type msconfig.
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  2. Go to the Services tab.
  3. Check the Hide all Microsoft services box and choose the Disable all option.
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  4. Go to the Startup tab and click on Open Task Manager.
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  5. In the Task Manager, select each startup item one by one and then click on Disable.
  6. Close the Task Manager and press Ok on the window to save the settings.
  7. Reboot the system.
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The new Windows 10 build is intended to resolve the error of high CPU usage, leaving your computer bereft of the essential updates for a long time is likely to slow down the computer irrespective of the high CPU usage error. Coupled with this error, a failure to install the updates for a long time may lead to system errors may make your computer incapacitated for use, so we recommend installing the latest updates at the earliest.

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