This information is based on CCleaner version from June 24th 2010

MyDefragPowerGUI has a built in cleaner function but it's a very simple one. There is a more advanced cleaner programs available on the internet and it's name is CCleaner. CCleaner is a 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!

Program Summary:

Cleans the following:

• Internet Explorer
  Temporary files, history, cookies, Autocomplete form history, index.dat
• Firefox
  Temporary files, history, cookies, download history, form history
• Google Chrome 
  Temporary files, history, cookies, download history, form history
• Opera
  Temporary files, history, cookies
• Safari
  Temporary files, history, cookies, form history
• 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
  Removes temp files and recent file lists (MRUs) from many apps including Media Player, eMule, Google Toolbar, Netscape, Microsoft Office, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and many more...