CCleaner Professional is the paid version of Piriform CCleaner. It includes additional features like cleaning or removing Windows 10 telemetry data, Firefox browsing history and Google Chrome browsing history. Piriform CCleaner Professional is a system optimization, privacy and cleaning tool. It removes unused files from your device - allowing you to run faster and freeing up useful hard disk space. The Following are the steps for downloading, installing and activating CCleaner Professional: 1. Go to the official website and Download CCleaner Professional https://ccleaner.com/professional/download 2. Once Download "Piriform CCleaner Professional" is completed. 3. Next install it on your PC by double-clicking on the .exe file in the download folder. 4. Follow the onscreen instruction and complete your installing process. 5. Now you provide your CCleaner Activation Code. And activate your CCleaner Professional.