Ccleaner installed shield - how do I get to the installed programs information?
I’m not sure just what you are meaning by that?
CCleaner is not a “shield”, it cleans things (and updates things) it doesn’t shield them.
(Or are you saying that CCleaner installed something else?)
If you are looking for information about your installed CCleaner version then go to “Settings” (the cogwheel bottom-left) and click on the “About” tab.
If you are looking for something else then please clarify exactly what it is that you want to find.