I'm sure a request like this has been posted before, but what about the ability for CCleaner to clean multiple windows user profiles at once? As it stands, you have to log into each account, install CCleaner again, or manually navigate to C:\Program Files\CCleaner and run the .exe in order to use CCleaner on multiple accounts.
It's not a big hassle to do all that, but a change like this would make CCleaner a lot easier to use, at least in my opinion. Or at least more convenient in a situation with multiple user profiles.
You don't have to keep installing it, and I see no reason why you would think you did. I also can forsee sooo many problem arising from cleaning SOMEONE ELSE's user
When CCleaner runs one can right click on the animated icon in Tray and chose "Shutdown after Clean". It's actually easier to shut down the PC that way. CCleaner will do it all for you. Once the other users realizes this more of them will start using this function.