CCleaner Professional Plus 2026 v11.2.6 Ultimate CCleaner Professional Plus 2026 offers advanced features for system cleaning and optimization. It includes real-time monitoring, automatic updates, and enhanced privacy protection to keep your PC running smoothly and securely. Installation: 1. Download the setup file. 2. Right-click on setup.exe and select 'Run as Administrator'. 3. Follow the on-screen instructions to complete the installation. - Run setup.exe as Administrator