Have you tried removing this in SAFE MODE? That is one of the suggestions I have found for use when a Norton program disk is no longer available.

Found others but they involve a registry edit.
Delete the following registry keys using REGEDIT

Delete: HKEY_CLASSES_ROOT\CLSID\{BDA77241-42F6-11D0-85E2-00AA001FE28C}

Delete: HKEY_CLASSES_ROOT\TypeLib\{6F952B50-BCEE-11D1-82D6-00A0C9749EEF}

Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\SharedDlls
In the right pane, delete all keys with Symantec shown in the path