CompatTelRunner.exe is a part of the services that Microsoft provides. It is used to upgrade the system to the latest OS version or other Service Pack upgrades. Its function is to test the compatibility of the software. It also allows Windows OS and programs to search and download updates.

It takes up much of storage bandwidth. Users complained that it slows down the PC and files show up in the Task Manager consuming CPU and Disk Usage. Therefore it is necessary to sort out this issue.

How to Fix CompatTelRunner.exe High CPU and Disk Usage in Windows 10

Method 1 – Take Ownership and Then Delete the CompatTelRunner.exe

Step 1: After logging in as an administrator, open the Start menu. Press the Windows key on the keyboard or click the Windows icon at the end of the taskbar.

Step 2: In the search box, type compattelrunner.exe. Instead of opening the file named compattelrunner, right-click on it. A drop-down menu will appear. Select Open file location or hold the Windows Key and Press R.

Step 3: After this, type C:\Windows\System32. In the search bar on the top-right corner, type CompatTelRunner.exe.

Step 4: Right-click the CompatTelRunner.exe within the folder. Select Properties

in the menu that appears. A window opens on the screen. Click on the Security tab and select the Advanced button.

Step 5: After the window opens, locate the Owner tab and choose Change owner. It will display a list of new owners. Click Apply after selecting the account you are using.

Step 6: To change the ownership, a prompt warning will come up. So close all Properties windows that are currently open.

Step 7: Next, change the permissions. Right-click the Compattelrunner.exe file again and open Properties. Once again, go to the Security tab and click the Advanced option and select Permissions. Then click on the account you are using. In the window that appears, select Full Control and then click Apply.

Method 2 – Disable CompatTelRunner.exe from Task Scheduler

Step 1:Firstly, press R, and hold the Windows Key together.

Step 2: Secondly, type taskschd.msc, and then click, OK.

Step 3: Thirdly, open the Task Scheduler Library -> Microsoft -> Windows -> Application Experience.

Step 4: Lastly, choose Disable after right-clicking on any of the tasks listed as Microsoft Compatibility Appraiser.

These steps will delete the file safely. The computer will run smoothly in no time.

Conclusion

The aforementioned methods are fairly straightforward, and the user will not face PC slowdowns any more, and the issue will be resolved.