I've had to uninstall the latest CCleaner and install an earlier version that functions properly, because with the newest one, even with startup option disabled, it still loads with Windows 10 in the task tray. The only time I ever want to see CCleaner doing a thing is when I run it myself, but for some reason, on a fresh install of Windows 10 1909, it's running on startup even when disabled in options. I even went as far as to remove the thing from startup/scheduler with Autoruns, and it adds itself back to it every time. So back into settings I went, looking for the culprit, and I could find nothing. The option for scheduling is disabled with the free version, but it was for some reason adding itself to scheduler and running at every startup anyway.