There are many different cleanup utilities, and they come in several varieties. To begin with we can define the set of cleaning utilities including CCCleaner, a freeware program that are used to get rid of unused files and recover room on the disk. Also you can find other software products that are especially suited to erasing browser tracks and delete traces of things you have typed while searching found in your browser, software such as Privacy Eraser. Also common is the porn detector software, which can be used to discover the exact source of pornography style images and movies and a range of other inappropriate files and assists the user in deletion of the detected objects. The last category of drive cleaners is the 'disk washer' style product, which is designed to make unreadable any orphan data from any part of the hard drive, so that it may not be used for malicious purposes.