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A description of the CCleaner utility for Windows.

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Topic Overview

CCleaner (formerly Crap Cleaner) is a freeware utility program used to optimize a user's computer performance and clean its registry. It was developed by Piriform and is designed for Microsoft Windows. CCleaner is freeware, though Piriform accepts donations through its website to develop the company's programs further. CCleaner is available in 35 different languages, with more to be added. Technicians at ITS frequently use this application to fix registry errors and improve performance by cleaning up junk files.



Operating system

Microsoft Windows


System Optimizer and Registry Cleaner






CCleaner allows the user to remove unused temporary files from Internet browsers and other supported applications along with browsing history, cookies, recycle bin, and AutoComplete form history. It allows for the cleaning of the recycle bin, memory dumps, file fragments, log files, system caches, application data, and various other data. The program also includes a Registry Cleaner to locate and correct problems in the Windows Registry such as missing shared DLLs, unused file extensions and application paths.

CCleaner supports the cleaning of temporary and unneeded files from certain programs, including Firefox, Opera, Internet Explorer, Safari, Google Chrome, Foxit Reader, Microsoft Office (2000, XP, 2003, 2007), Nero Burning ROM, Java, Windows Live Messenger, ZoneAlarm, Flash Player, QuickTime, VirtualDub, Windows Media Player, 7-Zip, Avira AntiVir, Spybot - Search & Destroy, Windows Registry Editor, eMule, KaZaA, Google Toolbar, Netscape, Adobe Acrobat, WinRAR, WinAce, WinZip, and many other applications.

CCleaner assists in the uninstallation process by allowing users to uninstall programs from CCleaner itself. In addition, CCleaner also allows the alteration of start-up programs, similar to the Microsoft Windows MSConfig Utility. Users can disable several start-up programs to free up processor speed at start-up. As of version 2.13.8, CCleaner also allows users to delete System Restore Points.


Complete usage guide can be found here.

Sources and Relevant Links

ITS preferred PC apps