Hello,
1) Stop all third-party services including antivirus before starting the Backup.
2) Install the latest Veritas device drivers:
VERITAS Backup Exec (tm) 9.1 - Device Driver Installer (20050115) - Includes Tape Driver Release (20041231) and Robotic Library Release (45) (Intel Only) http://seer.support.veritas.com/docs/273853.htm
Refer to the following technotes:-
1)Title:-
How to correct slow backup performance, slow virus or pre-job scans, and agent initialization problems on fragmented Windows NT,Windows 2000, and Windows 2003 server partitions http://seer.support.veritas.com/docs/237444.htm
2)Title:-
What VERITAS Backup Exec (tm) settings can be modified to reduce the amount of time it takes for a backup to run?
http://seer.support.veritas.com/docs/249090.htm
3)Title:-
URL: http://seer.support.veritas.com/docs/231488.htm
NOTE : If we do not receive your intimation within two business days, this post would be marked assumed answered and would be moved to answered questions pool.