Why Does Microsoft Compatibility Telemetry (CompatTelRunner.exe) Loads High CPU/Disk on Windows 10?

In case you are facing with low system performance on Windows 10 or you are noticing high temperature or cooler speed – at first you need to check your Task Manager. This tool allows you to indicate the process which causes the high load (CPU, graphics, disk usage, memory etc.). Quite often such problems can be caused by Microsoft Compatibility Telemetry process (it is also known as CompatTelRunner.exe).

So, the first important thing is that in case this process loads your system high in a short time period – there is nothing wrong with that. The other thing is when Microsoft Compatibility Telemetry doesn’t reduce the load over time, and that prevents you from comfortable work with other applications. In this short article we’ll take a closer look on what is Microsoft Compatibility Telemetry (CompatTelRunner.exe) and everything you need to know about it.

What’s the Purposes of Microsoft Compatibility Telemetry Process?

Microsoft Compatibility Telemetry (CompatTelRunner.exe) is a service that is responsible for gathering telemetry and diagnostics data from your computer; it’s being installed with update KB2952664. So, why do you need it? Microsoft tells us that it helps to make the operating system better, to analyze and correct issues and errors. The service won’t touch your files, passwords or other objects that are stored on your PC. Microsoft Compatibility Telemetry (CompatTelRunner.exe) is a part of the system processes and enabled by default.

Note. CompatTelRunner.exe is used not only in Windows 10, but also in Windows 8 and Windows 7 (in case you’ve installed the updates KB 3075249 and KB 3080149), but if you are facing with the process on Windows XP – most likely, it is a virus or malware.

What to Do When Microsoft Compatibility Telemetry (CompatTelRunner.exe) Causes High Disk Usage?

A lot of users are widely discussing the problems with the lack of privacy because of what Microsoft telemetry collects. We won’t continue this discussion – today we will concentrate all attention on a practical side.

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The other important thing is that CompatTelRunner.exe is not perfect (as many of other Microsoft products) and because of that some issues may appear during functioning (for example – high disk usage or high CPU load). This can happen due to different factors, but user have to solve the problem with Microsoft Compatibility Telemetry (CompatTelRunner.exe) to continue comfortable work on Windows machine.

How to Disable Microsoft Compatibility Telemetry (CompatTelRunner.exe)?

Important! In order to implement the instructions below you will need an account with administrator privileges.

Method 1: via Task Scheduler

Windows telemetry does not have to be deleted; it can simply be turned off and turned on again if desired.

  1. Open the Task Scheduler system utility.
    compattelrunner.exe microsoft compatibility telemetry
  2. In the directory tree on the left, go to “Task Scheduler Library” → “Microsoft” → “Windows” → “Application Experience”.
    compattelrunner
  3. In the central window, select the “Microsoft Compatibility Appraiser” task and in the action block on the right, click “Disable”.
    compattelrunner.exe

Changes will take effect after rebooting the PC. If this does not lead to a positive result, proceed to the next step.

Method 2: in Windows Settings

You can’t delete CompatTelRunner.exe (at least it won’t be easy!), because the service is deeply built into the system and that can lead to unexpected results. However, user can stop this service and prevent it from re-starting:

  1. Go to Settings and change the needed privacy options. To do this press Win + I and go to Privacy → General. Here you need to turn off all options. They are various in different Windows versions, but generally – you need to check them off as on the screenshot below:
    compattelrunner high cpu
  2. Now switch to Feedback & Diagnostics section and make sure that the parameter Diagnostic is set to Basic.
    what is compattelrunner.exe microsoft compatibility telemetry
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Now you need to check if the steps above helped. If not – use more advanced steps described below:

Method 3: Stop Service and Edit Hosts

  1. Press Start and type in Services and run the app;
    compattelrunner.exe microsoft compatibility telemetry high cpu
  2. Find service Connected User Experiences and Telemetry. In the list, right click on it and press on its Properties;
    microsoft compatibility telemetry
  3. Press Stop, then click on Startup type and choose Disabled from drop down menu;
    compattelrunner.exe high cpu
  4. Press ОK, and then close Services window;
  5. Now you need to edit hosts file. Go to C:\Windows\System32\Drivers\Etc and find file hosts;
  6. Right click on it and choose Properties;
    compattelrunner.exe windows 10
  7. At Security tab press on Edit…;
  8. In newly appeared window you need to choose current group or user names and give necessary permissions for users. After that click OK;
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  9. Now open file hosts using Notepad (right click on file → Open with → Notepad) and paste the following strings in the end of the file:
    127.0.0.1 vortex-win.data.microsoft.com
    
    127.0.0.1 settings-win.data.microsoft.com

compattelrunner cpu

Save the file and close Notepad.

Method 4: Disable Telemetry using Group Policy

  1. Open the “Edit Group Policy”.
    what is compattelrunner.exe
  2. In the directory tree on the left, go to Computer Configuration → Administrative Templates → Windows Components → Data Collection and Preview Builds.
    compattelrunner high disk
  3. Select “Allow Telemetry” and click “policy settings” on the left. compattelrunner windows 10
  4. Check “Disabled”, then click “Apply” and “OK”. compattelrunner exe microsoft compatibility telemetry

After implementing the instructions above, the Microsoft Compatibility Telemetry (CompatTelRunner.exe) process shouldn’t start again or load high CPU or disk.

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