Sometimes, the backup files get corrupt, damaged and this happens when the backup files are saved in the local hard disk and not protected by System Restore. Common causes of BKF file corruption are CRC errors, registry corruption, backup interruption, sudden system shutdown, unrecognized media and software failure.
So, it is very compulsory to keep up the backup copies of all files and folders in order to restore them using Restore Wizard or the Automated System Recovery Wizard whenever the operating system get gone down. NTbackup.exe is a tool which is inbuilt with the windows it can be used to create the backup files.
When the data that get deleted, lost, corrupted or damaged due to logical or physical errors BKF file, Backup files can be used for restoring the lost items.
For doing it, this software performs repair operation to retrieve valuable BKF files created by using Veritas software for Windows NTBackup or Backup Exec. In this system, it locates all the BKF files.
In DAT file, it restores scan output to recover it later. It also supports the backup utility of Windows 2003, Xp and 2000.
So I will Recommend:- http://www.filesrecoverytool.com/bkf-recovery-tool.html