CCleaner is an optimization software that clears junk files, fixes registry issues, and controls startup programs. Clears cache, temporary files, browser history, restore points, duplicate files, and more. It includes essential tools like a registry cleaner, an uninstaller, and a space eraser for privacy. A great tool for those seeking to enhance their computer’s performance and optimize its speed. Although there was a past malware issue, recent versions of CCleaner are considered safe if kept updated.