This error means that the BKF file that is being used to restore the data is itself corrupted and cannot be used to recover the data.
This error usually occurs when users switch from a Windows XP machine to a Windows 7 machine to restore their data from the BKF file created using the NTBackup utility.
This error when you are trying to restore the data from the corrupt BKF using the NTBackup utility.
This error means that the BKF file is corrupt and data cannot be accessed through this BKF file using the NTBackup file. It needs to be repaired using a recovery software.
This error usually occurs when the size of the backup being created on the file system exceeds the capacity of the backup disk being used.