With the last Windows 10 update, CompatTelRunner.exe is causing 100% CPU usage after Windows start. This is annoying sometimes. So, How can we fix this?
CompatTelRunner.exe is a component of Windows Compatibility Telemetry, periodically sending anonymous usage and performance data to Microsoft developers to help improve Windows.
Its default location is C:/Windows/System32/, which you should verify. A good tool for this is Process Explorer. If the folder is wrong, then this is actually a virus.
First verify the state of Windows by running sfcs/cannow.
If this doesn't help, you can disable it by one of these methods (reboot is required):
- Run Group Policy Editor (gpedit.msc) and position to Computer Configuration > Administrative Templates > Windows Components > Data Collection and Preview Builds. Double-click "Allow Telemetry", select Disable, then click OK.
- Run Task Scheduler (taskschd.msc) and position to Task Scheduler Library > Microsoft > Windows > Application Experience. Right-click the "Microsoft Compatibility Appraiser" task, and select Disable.
- Edit the registry: Run regedit, position to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DataCollection, right-click the right pane and select "New > DWORD (32-bit) Value". Name it Allow Telemetry and set its value to 0.