Можно подвергнуть очистке и реестр Windows, избавив его он ненужных расширений, старых библиотек dll и неверных путей, которые накапливаются в немалом количестве, особенно после установки и удаления разнообразных программ. Проделав все эти операции над своей системой, вы не только освободите пространство на диске, но и увеличите производительность системы в целом.

Unattended Edition - программа которая устанавливается автоматически. При установке Unattended программ нет нужды постоянно жать далее, вбивать серийник или крякать, русифицировать, etc – т.е. запустил инсталлятор и за несколько секунд (у кого за несколько минут J) установилась программа. После установки работа программы не отличается от той, которая была [установлена/ крякнута/ русифицирована/ etc] обычным способом. Представьте себе ситуацию: Вы администратор и вам нужно установить на множество компьютеров Windows (естественно это будет unattended Windows build) и установить один и тот же комплект программ. Если использовать unattended soft, то вы можете сильно сэкономить время.

CCleaner is a freeware system optimization and privacy 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. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware!

Unattended Edition - the program which is established automatically. At installation Unattended of programs there is no need constantly to press further, to drive in or to grunt, etc – i.e. has started and for some seconds (at whom in some minutes J) the program was established. After installation work of the program does not differ from that which was usual way. Imagine a situation: you the manager and to you it is necessary to establish on set of computers Windows (It will be natural unattended Windows build) and to establish the same complete set of programs. If to use unattended soft you can strongly save time.

Cleans the following:
- Internet Explorer: Temporary files, URL history, cookies, Autocomplete form history, index.dat.
- Firefox: Temporary files, URL history, cookies, download history.
- Opera: Temporary files, URL history, cookies.
- Windows: Recycle Bin, Recent Documents, Temporary files and Log files.
- Registry cleaner: Advanced features to remove unused and old entries, including File Extensions, ActiveX Controls, ClassIDs, ProgIDs, Uninstallers, Shared DLLs, Fonts, Help Files, Application Paths, Icons, Invalid Shortcuts and more... also comes with a comprehensive backup feature.
- Third-party applications: mRemoves temp files and recent file lists (MRUs) from many apps including Media Player, eMule, Kazaa, Google Toolbar, Netscape, MS Office, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and many more...
- 100% Spyware FREE: This software does NOT contain any Spyware, Adware or Viruses.

Features of CCleaner 2.0:
• Complete rebuild in C++
With the requirements for a portable version, 64-bit compatibility and Windows Vista increasing against the limitations of the old architecture. We decided to rebuild the entire CCleaner application in highly optimized C++.
• Faster analyzing and cleaning
Each scanning process was rewritten from scratch and fully optimized. The result being a noticeable speed increase in all areas.
• Portable
CCleaner can now run from a USB thumbdrive and be installed/run on a computer without a complicated setup process.
• Compact
The rewrite removed all external file dependencies, so the main EXE is now half the size of the original program and support files.
• Redesigned User Interface
The original CCleaner user interface was looking a little dated, so the GUI was redesigned with a modern look, but without sacrificing speed or usability. New icons were created for the interface and the main program icon was updated with a more modern style.
• Exclusions
It is now possible to specify files, folders and registry keys to ignore from the cleaning process.
• Loads of little tweaks
Too numerous to mention them all separately, we've tried to improve CCleaner in all areas.

Changes in CCleaner 2.19.900:
- Added support for Firefox 3.5 beta.
- Fixed IE8 cookies deletion after reboot.
- Improved support for Google Chrome v2.
- Fixed bug with IE8 cookies.
- Added support for Flash Cookies.
- Added Tool to manage System Restore Files (XP and Vista only).
- Added support to remove Opera Recently Typed URLs.
- Fixed bug which was displaying wrong Total Bytes removed.
- Improved exception handling.
- Fixed virtual function bug.
- Minor performance improvements.