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DOWNLOAD FREE CCLEANER LATEST VERSION
CCleaner works with 32-bit and 64-bit versions of Windows 8, Windows 7, Windows Vista,Windows XP, plus older versions of Windows as well.
Two installation methods are available. The first is referred to as "Installer" and is a full install of CCleaner, which includes an option to also install Google Chrome and the Google Toolbar for IE. The second is the "Portable" version, which I recommend, and doesn't require installation at all.
Note: A "Slim" version is also sometimes available, which is the same as the "Installer" option but without the Google software installation options.
CCleaner is actually more than just a registry cleaner tool. It's probably more accurately called a system cleaner because it actually cleans a lot more than just your registry.
As far as the registry cleaning functions are concerned, CCleaner, like all registry cleaners, is primarily concerned with removing entries in the Windows Registry that refer to files, programs, or other resources that no longer exist.
For example, CCleaner will remove registry keys and registry values that point to programs and files that no longer exist in Windows. These abilities are exactly why running CCleaner, or another well designed registry cleaner, is a great troubleshooting step when faced with a "missing file" or "cannot find a file" sort of errors, especially as Windows starts.
Specifically, CCleaner will remove registry entries that point to the following if they no longer exist: DLL files, file extensions, COM/ActiveX objects, type libraries, applications and application paths, fonts, help files, installers, sound events, and services.
Outside of the registry, CCleaner also removes temporary browser data like cookies, history, and the cache from all popular browsers. You can also do things like empty the Recycle Bin, clear MRU lists, empty the thumbnail cache in Windows, and much more.
CCleaner also has a "Tools" area where you can uninstall programs, view and change the programs that startup with Windows, find duplicate files, remove restore points, and evenwipe a drive.