Does not require installation; simply unzip the files and run CCleaner64.exe (for 64-bit systems) or CCleaner.exe (for 32-bit systems) from any folder. Professional vs. Free Portable
Automatically cleans browser history and temporary files when you close your browser. CCleaner Pro Portable 6.04.10044Microsoft
While a free portable version exists, the version (which requires a license key) unlocks several automated tools: Does not require installation; simply unzip the files