Disabling Windows Compatability Telemetry

I don't have the DD17FA14 subkey in my registry. Is there any other key I should look under?

Registry keys that are on their default value are sometimes simply not there. If it's missing just create it. I think a .reg file was provided in the article, you can just use that if you're worried about making the wrong key though.

I don't have the DD17FA14 subkey in my registry. Is there any other key I should look under?

Then make a .cmd with the following code and start it on bootup:

@echo off

:start

taskkill /f /im CompatTelRunner.exe >nul 2>nul

timeout 2 >nul

goto start

If it keeps coming back (and it does for all of us), you could schedule a test to run every 30 seconds or something and execute taskkill /f /im CompatTelRunner.exe. This would force kill the process if it's running, and it shouldn't impact performance even if you ran it once per second. Note that this will probably require administrator privileges. 

In an ironic twist of fate, the task scheduler itself is quite broken too. The conditionals are messed up (for Network presence, for one), and many of my self-defined tasks don't run past a reboot. Besides, the lowest interval it can run at is 5 minutes, which is about 4:59 mins longer than I want CompatTelRunner to run unchecked.

If it keeps coming back (and it does for all of us), you could schedule a test to run every 30 seconds or something and execute taskkill /f /im CompatTelRunner.exe. This would force kill the process if it's running, and it shouldn't impact performance even if you ran it once per second. Note that this will probably require administrator privileges.