In order to troubleshoot the problem, kindly refer the following steps.
Uninstall Veritas Update from ADD/Remove Programs.
--Once you remove Veritas Update, kindly re-install the same again.
-- Install VERITAS Update manually on the computer by following these steps:
-- A. Browse to the Winnt\Install\VxSDM directory of either the Backup Exec CD or downloaded installation files.
-- B. Execute SETUP.EXE.
Once Veritas Update is installed again, please reboot your system and check if the problem is solved.