Piriform is a private limited company founder in London, UK in 2004. The company is located in 78 York Street, London United Kingdom. CCleaner is one of the main products that are currently developed by Piriform. CCleaner cleans unwanted leftover files from computer program such as Internet Explorer, Google Chrome, Opera, Safari, Windows Media Player, eMule, Google Toolbar, Netsacape, Microsoft office, Nero, Adobe Acrobat, Adobe Flash Player, Sun Java, WinRAR and other application. CCleaner also has function to clean up Windows Registry and an uninstall tool. CCleaner can be installed on both Windows or Mac OS X. The program is available in 47 languages and free.