Do you know anything about Veritas?
A friend of mine has a trouble removing it from a pc.
DecayClan is correct. Veritas has lots of software. I have listed a few Veritas applications below but their total list of software is MUCH bigger.
NetBackup
BackupExec
Enterprise Vault
Global Cluster
Volume Replicator
It is best to start with the applications own uninstall application. Sometimes the uninstall is found with the program shortcut on the Start Menu but the uninstall option is more commonly found in Add/Remove Programs.
If you are comfortable with editing the Windows registry, you can search for Veritas and delete found entries. BE VERY CAREFUL when deleting items from the registry. You can cripple Windows if you make a mistake.