Download CCleaner 5.6 – Free PC Cleaner and Optimization Tool for Windows

CCleaner 5.6 is one of the most widely used free PC cleaning and optimization tools for Windows, developed by Piriform (now part of Avast). It scans your computer for junk files, temporary data, browser cache, cookies, and other unnecessary clutter, then removes them safely to free up disk space and help Windows run more smoothly.

Beyond cleaning, CCleaner includes a Registry Cleaner that finds and fixes invalid or broken registry entries left behind by uninstalled programs, a Startup Manager to control which programs launch at Windows boot, an Uninstaller for managing installed applications, and a Disk Analyzer to visualize what is taking up space on your drives.

CCleaner 5.6 supports cleaning Chrome, Firefox, Internet Explorer, Edge, and Opera browser caches, as well as temporary files from Windows itself and dozens of third-party applications. It is available in both free and Professional versions — the free version covers all essential cleaning and optimization features for everyday use.

Key Features

• Removes junk files, temporary files, browser caches, and cookies to free up disk space.
• Registry Cleaner fixes invalid registry entries left by uninstalled software.
• Startup Manager lets you enable or disable programs that run at Windows startup.
• Uninstaller provides a clean list of installed programs for easy removal.
• Supports cleaning 30+ popular applications in addition to Windows system files.
• Browser cleaning works with Chrome, Firefox, Internet Explorer, Edge, and Opera.
• Free version covers all core cleaning features; Pro version adds real-time monitoring and automatic updates.

How to Install

1. Download CCleaner 5.6 from the link below.
2. Run the installer — choose Custom Install to deselect any optional offers during setup.
3. Launch CCleaner and click Analyze to preview what will be cleaned before committing.
4. Click Run Cleaner to remove all detected junk files from your PC.
5. Use the Registry section to scan for and fix broken registry entries, and the Tools section for startup and uninstaller management.