A BKF (Backup) file contains copies of the backed up data created using any backup program such as Symantec (VERITAS) or NT-Backup Exec. Now, the difference between Symantec Backup Exec and NT-Backup Exec is Symantec Backup Exec:- It was formerly known as VERITAS, which is a backup software application used to create system backup, SQL backup, and Microsoft Exchange Server backup. Symantec Backup Exec is supportable with Linux, Windows 7, Red Hat Enterprise, SUSE Linux Enterprise Server. NT-Backup:- NT-Backup is in-built backup utility program of Microsoft Windows, commonly known as Windows BKF file. This backup is available in Windows NT, 2000, XP and Server 2003. NT-Backup was replaced by Windows Backup and Restore in Windows Vista.