Important Updates are ‘major updates to ensure that CCleaner runs safely and smoothly on your system’. An example could be a major update to move you to a version of CCleaner that updates automatically, as doing so means you’ll always have the latest and safest version of CCleaner on your PC.
How to opt in and out of Important Updates
We recommend that Important Updates are switched on, but this is your choice.
You can control if Important Updates can take place automatically and if so, whether you wish to be notified when one has taken place. All notifications will come from the app and will usually consist of a pop up message in the bottom right of your screen.
To amend your update choices, open CCleaner, and go to Options > Updates. See ‘Important Updates’. If ‘Apply these updates automatically’, is ticked, you will receive Important Updates. You can change your settings at any time.