CCleaner auto-updated itself and opened on machine startup.

CCleaner for Windows
1

I have had an older version installed for a few years. I have had updated turned off since the beginning.

I removed all CCleaner update entries from Task Scheduler, and from startup long ago.

I just turned my computer on at 9am, went up stairs to make another cup of coffee, came back to the computer and CCleaner is open on the screen with a popup telling me I now have the newest version installed.

Task scheduler now has CCleanerCrashReporting and CCleaner emergency updater entries

So Dev, want to explain this @%#$ ?

2

The updating was intentional, and you should have been geting notifications that it would be happening, (unless you specifically took action to prevent it) see these posts: