CCleaner System Optimization Tool

CCleaner is a system optimization, privacy protection, and cleaning utility for Windows and macOS. Developed by Piriform Software Ltd (acquired by Avast in July 2017 for $1.3 billion, now part of Gen Digital), CCleaner was first released in 2003 by Guy Saner and is headquartered in London, United Kingdom. Downloaded over 2.5 billion times, serving over 100 million users. Key features: cleaner: removes unused and temporary files from the operating system and applications. Cleans browser cache, cookies, history, download history, form data, session data, and saved passwords across Chrome, Firefox, Edge, Safari, and Opera. Cleans Windows Recycle Bin, Recent Documents, temporary files, log files, clipboard, crash reports, and old Windows installation files. Registry cleaner: scans for and fixes registry errors including missing shared DLLs, unused file extensions, obsolete software entries, ActiveX and COM issues, and missing application paths. Registry defragmentation. Tools: uninstall programs completely including leftover files and registry entries. Manage startup programs to reduce boot time. Browser plugins manager. Duplicate file finder. System restore point management. Disk wiper to securely erase free space or entire drives. Supports multiple overwriting methods (1-pass, 3-pass, 7-pass, Gutmann 35-pass). Driver updater: scan for outdated drivers and update automatically. Software updater: check for and install updates for installed applications. Health check: one-click optimization. Custom files cleaning. Scheduled cleaning. C++/C. Proprietary with free tier.