So I would like to know where exactly this is referencing to show this message whether it be a cookie, registry or folder.
Because I assure you it doesn't show on my computer. And yes I have worked in IT all my lfe, so you can be as technical as you like in your answer.
Maybe it shows on a brand new computer that has never had a copy of ccleaner installed ever.
But considering people were complaining about this on the avast forum a few months ago, it obviously hasn't been tested properly.