Many people believe formatting the drive or deleting the file will complete delete information from the drive. Actually that is not so. A real deleting of files on drives is only possible through a complete overwrite of the original files with (meaningless) data. A simple delete as executed by all OSes makes files only non accessible on the OS and application program level (the file names are gone). But the fact is, that the complete contents of all that files are still there, waiting to be completely recovered, at least as long as they are not overwritten by new files. Formatting in most cases will rebuild file allocation data but all information still present on the drive. It means that your confidential information can be easily recovered with data recovery software.
There is only one way to prevent problems with the data you thought was deleted. You need to use wiping solution. Your private photos, passwords, financial records and other confidential documents aren't safe!

• Digital File Shredder Pro 3.2.1.5
  Permanently erase personal data, shred deleted e-mails and eliminate your Internet and Instant Messenger history with Digital File Shredder Pro while improving your computer?s...

• Smart Data Scrubber 3.1
  Do you know that after you have completely deleted information from your hard drive, it is still there? There are a lot of ways to restore deleted data

• Smart Data Scrubber 3.4
  Do you know that after you have completely deleted information from your hard drive, it is still there? There are a lot of ways to restore deleted data. Just imagine what could happen if your personal information were used by ill-intentioned people....

• PC Disk Eraser 5.7 5.7
  PCDiskEraser enables you to easily, quickly and permanently erase all data that is personal, confidential and critical on your hard drive

• FILExtinguisher (PC) 2.0
  FILExtinguisher securely deletes all confidential information. You can securely erase passwords, credit card numbers, customer information, tax records and other types of sensitive data. This software offers different 14 delete methods that vary from a fast zero-write to an extremely high security NATO level. Upon completion a certificate is...

• Data Erasure Tool 3.0.1.5
  Data wiper software permanently erases your personal documents, wash internet history, links of last visited URLs, cache, cookies etc

• Hard Drive Wiper 3.0.1.5
  Hard drives data sanitization software allows you to permanently wipe selected files and folders, entire logical drives, internet traces including History, Cookies, typed URL, Internet cache and other administrator temporary files from your...

• Data Cleaner Software 3.0.1.5
  Disk wiping software permanently removes your confidential information, sensitive records, personal content and secret stored data from windows hard disk drive and USB removable flash media to maintain your privacy

• Permanent Data Wiper Tool 5.0.1
  Data eraser software permanently deletes temporary files folders remove internet history address bar URL records from hard disk removable media