CCleaner is a freeware PC optimization tool.
It combines a system cleaner that removes unused and temporary files from your system and also a fully featured registry cleaner!
CCleaner allows Windows to run faster, more efficiently and gives you more hard disk space.
The best part is that it's Small, Fast and Free!




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
Google Chrome
Opera
Safari
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
Advanced Options allow cleaning of:
Menu Order cache
Tray Notifications Cache
Window Size and Location Cache
User Assist history
IIS Log Files
Custom Folders
Application Cleaning:
As well as cleaning up old files and settings left by standard Windows components, CCleaner also cleans temporary files and recent file lists for many applications. Including:

Firefox, Opera, Safari, Media Player, eMule, Kazaa, Google Toolbar, Netscape, Microsoft Office, Nero, Adobe Acrobat Reader, WinRAR, WinAce, WinZip and more...
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...
Safety:
CCleaner was designed from the ground to be safe and secure to use. It has multiple levels of checks in place to ensure that it cannot delete any useful information or documents you may still need. We also certify that it contains no Spyware or Adware.
High Security:
For the super cautious users we also offer secure file erasing. By overwriting the files before deleting them, making it impossible to recover the data.
Multiple Languages:
Thanks to the translators, CCleaner is available in 35 different languages:

English, Albanian, Arabic, Bosnian, Bulgarian, Catalan, Chinese (Simplified), Chinese (Traditional), Czech/Slovak, Danish, Dutch, Finnish, French, Galician, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Lithuanian, Macedonian, Norwegian, Polish, Portuguese, Portuguese (Brazilian), Romanian, Russian, Serbian Cyrillic, Serbian Latin, Slovak, Spanish, Swedish and Turkish.