CompatTelRunner.exe High CPU and Disk Usage Error [Solved]

Microsoft has developed various setups or extension files that facilitate the update process. One such update file extension is CompatTelRunner.exe. It works as a preparatory before the Windows installer materializes the concrete system files of the installation process. The extension works to ensure the compatibility of the device while update the Operating system version.

In other words, It validates whether the new computer files would be able to work smoothly in the system or not. Also, the file works to update service packs that come pre-loaded in the installing medium. The file extension performs this important task while updating the operating system.

CompatTelRunner.exe High CPU and Disk Usage Error

The user can opt not to let this software run and thereby save time. Although, if you need to check the compatibility before installing the latest operating system, then you can let the windows installer perform the initial diagnostic steps. Unfortunately, a minor glitch here is that CompatTelRunner.exe consumes a lot of CPU and disk usage. Users have observed that the CompatTelRunner.exe file consumes more than 60% of the CPU and Disk usage before the updates concretely take place.

The process is not crucial to update, and the user can terminate it. The user can find the file placed in the ‘System32’ folder. For security purposes, the Windows installer does not allow to delete this file, and the users can only view it in ‘Read Only’ mode. It restricts the user from making any changes to the file’s functions.

How To Solve CompatTelRunner.exe High CPU and Disk Usage

Fortunately, every problem comes with manageable solutions. One of the solutions is that the administrator can adopt the possession of the installation process and then proceed further to remove the extension file from the computer. Another solution is to restrict the ‘Scheduled files’ to work while installing the operating system. Let us briefly understand how to solve the CompatTelRunner.exe High CPU and Disk Usage problem.

Method 1 – Corrupt System Files

Ideally, the file should not consume so much of the CPU and disk usage. It can happen if corrupt system files are present on the computer. Fortunately, the operating system has provided a tiny yet dominant command prompt facility called System File Checker (SFC).

Running this simple facility can fix any corrupt files present on the computer. Before running this, you need to create a full back-up restoring of all the files and features running in the computer to avoid any data loss. Login the computer using the administrator mode to conduct the task.

Perform the following steps to run the SFC command:

Step 1 – To begin with, press the Windows logo key + R at the same time using the administrator mode.


Step 2 – The run dialog box will appear on the screen. Type ‘cmd‘ on the address bar and to open the command prompt using administrator mode press control + shift + enter.

command prompt

Step 3 – The command prompt (Admin) will appear on the screen. Type the following command and press enter to perform system file checker (SFC) utility:

sfc /scannow

Corrupt System Files

Step 4 – Finally, Replace all the corrupt files in the system.

Restart the computer so that the new settings can take effect. It can rectify the problem of high CPU and disk space usage while installing a new operating system.

Other Solutions:-

Method 2 – Stop CompatTelRunner.exe File From Running

As mentioned above, the user can discontinue the file to function using the ‘Task Scheduler.’ Execute the following steps for the same.

Step 1 – To begin with, press the Windows logo key + R simultaneously.


Step 2 – Now, type ‘taskschd.msc‘ on the address bar and press Enter.

Task Scheduler

Step 3 – Task Scheduler window will appear on the screen. Double-click on ‘Task Scheduler Library‘; then double-click on ‘Microsoft‘; then double-click on ‘Windows‘ and finally click on ‘Application Experience.’

Stop CompatTelRunner.exe File From Running

Step 4 – Finally, from the available scheduled tasks, navigate for and right-click on ‘Microsoft Compatibility Appraiser‘ and select ‘Disable‘.

Disable Microsoft Compatibility Appraiser

This will successfully stop the ‘CompatTelRunner.exe‘ from running in your computer and solve the problem.

Method 3 – Take Possession of CompatTellRunner.exe and Then Remove It

As mentioned above, you can take possession of the file and then remove it. It offers a simple resolution to the problem. Login your computer with the administrator mode and perform the following steps for the same.

Step 1 – To begin with, you need to go to the folder where the extension file is present. For this, press Windows Logo Key + R simultaneously. A Run dialog box will appear. Type ‘C:\Windows\System32’ in the address bar and click on ‘ok.’

Step 2 – The folder will appear on the screen. Now, navigate for the file ‘CompatTelRunner.exe‘ along with the folder.

Step 3 – Once you locate it, right-click on the file and select ‘Properties.’ From the tabs visible in the properties window, click on the ‘Security’ tab.

Step 4 – Press the Advanced button located at the bottom of the window.

Step 5 – A new window will appear on the screen. Click on the ‘Change’ option situated under the head ‘Owner.’

Step 6 – To change the possession, enter the computer’s username under the option ‘Enter the object name to select’ and click on ‘Choose Names‘ to verify the username.

Step 7 – Finally, click on ‘OK.’ Now, again, go to the ‘Advanced’ option under the ‘Security’ tab and double click on the current username.

Step 8 – Lastly, click on tick ‘Full control‘ checkbox and press enter. That’s it. You are good to go now.

Now, delete the ‘CompatTelRunner.exe‘ file from your computer.

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Note that ‘CompatTelRunner.exe‘ does not harm the computer in any way. Although, in some cases, the CompatTelRunner.exe extension file can start consuming enormous CPU usage and disk space. The user should deal with the rising problem to avoid any possible damage to the hardware. Hopefully, the above solutions have helped rectify the CompatTelRunner.exe high CPU and disk usage error.

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