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CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains nO spyware or adware.

Cleans the following Windows components:

Internet Explorer
- Temporary File Cache
- URL History
- Cookies
- Hidden Index.dat files
- Last download file location
Firefox
- Temporary File Cache
- URL History
- Cookies
- Download manager
Recycle Bin
Clipboard
Windows Temporary files
Windows Log files
Recent Documents (on the Start Menu)
Run history (on the Start Menu)
Windows XP Search Assistant history
Windows XP old Prefetch data
Windows memory dumps after crashes
Chkdsk file fragments

Registry Cleaning:

CCleaner uses an advanced Registry Cleaner to check for problems and inconsistencies. It can check the following:
- File Extensions
- ActiveX Controls
- ClassIDs
- ProgIDs
- Uninstallers
- Shared DLLs
- Fonts
- Help File references
- Application Paths
- Icons
- Invalid Shortcuts and more...

More information on CCleaner: www.ccleaner.com