If your Piriform CCleaner Pro Software does not work after updating the Operating System to Microsoft Windows 10, it is expected to have Microsoft Windows 10 Compatibility problems. You can solve the issue by downloading and reinstalling the updated version of CCleaner Software. Go to the official web page CCleaner and download the latest version 5.0 CCleaner or all compatible versions with the Microsoft Windows 10 OS. First, confirm that you remove the uncomfortable installed CCleaner Application and the connected files then install the compatible version.