CCleaner Cleaning Tool - Courtesy of Doc's Computer Services

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CCleaner /ˈsklnər/ (formerly Crap Cleaner), developed by Piriform, is a utility program used to clean potentially unwanted files (including temporary internet files, where malicious programs and code tend to reside) and invalid Windows Registry entries from a computer.

CCleaner can delete temporary or potentially unwanted files left by certain programs, including Microsoft EdgeInternet ExplorerFirefoxGoogle ChromeOperaSafariWindows Media PlayereMuleGoogle ToolbarNetscapeMicrosoft OfficeNeroAdobe AcrobatMcAfeeAdobe Flash PlayerSun JavaWinRARWinAceWinZip and GIMP along with browsing history, cookiesrecycle bin, memory dumps, file fragments, log files, system caches, application data, autocomplete form history, and various other data. The program also includes a registry cleaner to locate and correct problems in the Windows registry, such as missing references to shared DLLs, unused registration entries for file extensions, and missing references to application paths. CCleaner v2.27 and later can wipe the MFT free space of a drive, or the entire drive.

CCleaner can uninstall programs or modify the list of programs that execute on startup. CCleaner 2.19.901 and later can delete System Restore points.


A public version 1.10 for Mac OS X has been released along with a commercial Network Edition. Piriform also released CCleaner for Android in 2014.

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