Windows does not physically remove deleted files from your hard disk... Your sensitive files can be recovered, even after you format your hard disk! When you delete a file from Windows, Windows just mark thefile as deleted in file allocation table, but the data of the file is still on your hard disk, there are many tools available which can let others easilyrecover your sensitive files even after you have formated the hard disk... And because Windows is not capable of deleting information beyond recovery, you are atrisk! Passwords, financial documents, even those "about last night" e-mails are fair game for the IT professionals, computer technicians orhackers...
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