Some features:

• Custom Wash Items: With this feature you can easily assign any files, folders, and registry entries to be cleaned. There are also several free preconfigured Custom Wash Item plugins that you can download! These plugins support many popular programs such as RealPlayer and Adobe Acrobat.
• Automates the cleaning of your Internet files and system files.
• Cookie Keeper: Certain Websites save your preferred settings within a cookie. This option is helpful if you have cookies you wish to keep.
• "Bleaching": For added security, Window Washer can completely overwrite files with random characters up to 10 times.