Indeed, official confirmation of @nukecad's response above: Users will receive a notification when a new version of CCleaner is released. These updates are free. Notifications can be switched off, but as with any software we recommend staying up to date with the latest version. Note that you are on the old version 5.46 which is now 13 versions out of date (  With the constant flow of updates to the software that CCleaner cleans, an