Answer – The best disk cleaning software that is prevailing in the market today is the Clean Disk Software. This software could be used to clean the various disks present in all the editions of Windows starting from Windows 95 to the latest Windows Vista. The Clean Disk Security deletes files and it also makes sure that the deleted files cannot be undeleted. It not only removes the directory of the deleted files but it also deletes the content of the deleted files. It also cleans the Window’s swap file, temporary files from your hard disk, like the Internet browser cache, files present in the Recycle Bin, and can clear the “recent files” list, search history lists, and URL history lists.

It deletes files that are difficult to delete, like the files left by Trojans or files with corrupted file names. It can also delete files like the “index.dat” files, which store Internet history, by scheduling them for deletion upon system restart. To do this one has to select a file to delete from the built-in file browser or drag a file to the application’s icon or window from Window’s Explorer.

Disk Investigator is used to discover all that is hidden on your hard disk and it helps in recovering lost data. Control3 is a file manager that makes encrypting and decrypting files and folders by just right clicking on the file and encrypting it using a password. Desktop cleanup hides all running applications other than those on the current screen.