Can I migrate Symantec AntiVirus 8.x and Symantec Client Security 1.x or older versions?
No. The client installation routine blocks the migration for these unsupported versions. You must uninstall the older version, then install Symantec Endpoint Protection. Before you do so, you should ensure that Symantec Endpoint Protection supports the operating system platform. If Symantec Endpoint Protection does not support the operating system, you may want to continue using Symantec System Center to manage these clients, or consider an upgrade to a supported operating system.