CCleaner is a cleaning utility for Windows. Which includes a registry cleaner(Advanced features to remove unused and old registry entries.), startup Management, Uninstall sections too.
The latest version of CCleaner supports 64 Bit operating systems and also included windows 7 support. The version v3.00.1303 includs one more utility "Drive Wiper" which will help you delete files permanently (it will allow you to wipe the free space of the entire drive).
v3.00.1303 (28 Oct 2010)
– New CCleaner 64-bit native EXE.
– New UI graphics and icons.
– New internal scanning architecture.
– New Drive Wiper tool screen under Tools section.
– New Intelligent cookie keeping functionality.
– Improved support for IE9.
– Improved support for Google Chrome.
– Improved HTML5 Database Storage cleaning.
– Added support to clean Microsoft Silverlight Isolated Storage.
– Added support for AVG AntiVirus 10.0, Audacity, LogMeIn Hamachi, BitTorrent and Windows Game Explorer.
– Improved support for Vuze.
– Added new environment variables: %SystemDirectory%, %SystemDirectory32% and %SystemDirectory64%.
– Improved Registry backup to address problems when saving values.
– Improved cleaning Windows Log Files for 64-bit OSs.
– Many UI improvements and bug fixes.