The 4.x series introduced several core features that are now standard in the application: : Background monitoring for junk files.
: Improved removal of browser history and temporary files for Google Chrome and Firefox . Comparison of Professional vs. Business Editions CCleaner Professional & Business Edition 4.37.1...
Both editions provide more advanced features than the free version, such as Automatic Updates and priority support. View Cleaner's version history and release notes - CCleaner Version 4
CCleaner version is a legacy release of the PC optimization software, originally launched around 2014 . While it remains accessible via Third-Party Archive Sites, it has been superseded by modern versions (currently v7.06 as of early 2026) which include critical security patches and support for modern hardware like ARM64 Architecture . Version 4.x Overview CCleaner Professional & Business Edition 4.37.1...
: Tools to disable programs that slow down Windows boot times.