CCleaner is famous for its Registry cleaner, which removes leftover entries from uninstalled programs.

While "CCleaner.v6.05.10102.rar" sounds like a specific file name you might find on a download site, it is actually an outdated version of the software. CCleaner is currently on , and downloading older versions via .rar files from unofficial sources is a major security risk. 1. Get the Right Version

: This is great for clearing out massive caches from browsers like Chrome or Edge without losing your saved passwords (just make sure "Passwords" is unchecked). 4. The Registry Cleaner (Use with Caution)

: Always click "Yes" when it asks if you want to back up the registry before fixing. If something goes wrong, you can just double-click that backup file to restore your settings. 5. Managing Startup Apps

If you want more control, go to . This is where the real power is: System : Check "Thumbnail Cache" and "Empty Recycle Bin."

Look for apps you don't need immediately (like Steam, Spotify, or printer helpers) and click . This won't delete them; it just stops them from slowing down your boot time. 6. Performance Optimizer