Hello, Piriform.
I've been experiencing a problem for the past year using the CCleaner free version. This has been happening for all the versions that have been launched over a year now.
The problem is that whenever I deactivate "CCleaner" from the Startup menu, it will automatically activate back on whenever I would open it again.
So the thing is, when I deactivate it from startup and restart my PC, CCleaner won't boot; but if I deactivate it from startup and open it, it will start up with the PC whenever I boot it up.
Hope I was coherent enough and you understood my problem.
Regards,
Gabriel.