These monitoring elements of CCleaner send user data such as anonymous system usage data back to the company's servers, as well as continuously scan systems to inform users when it comes across any junk or browser file, as first reported by Techdows. CCleaner 5.45 released in July-forces Active Monitoring and heartbeat features.CCleaner 5.44 released in June-adds pop-up advertisements.CCleaner 5.43 released in May-removes the option to opt out of data-sharing feature for users of the free software version.This time the system cleaning software is in headlines due to 'monitoring and data collection' features Avast added in past few months to your favorite system optimizer application.