Just wanted to know how to turn it off, cant find it anywhere in the settings so I'm wondering if there is any other way I don't know of. Kinda annoying
When you say opening do you mean actually showing the CCleaner window on screen?
Or do you mean giving you a prompt to clean or a notificatification that it has cleaned?
The first shouldn't happen, the second could happen depending on your Smart Cleaning settings.
If it's the second then you can either turn off Smart Cleaning altogether, or change the option so that it just cleans junk without showing you any notification.
You can also set a level for junk before it will be cleaned.
You can do the same for browser cleaning, turn it off for all, or set different options for each browser: