You did not use the /unmanaged switch, or you are running the setup.exe from the root of the DVD (which is the management console installer). Fix: Navigate deeply to \SEP\Win64\Setup.exe . The root folder contains Setup.exe for the Manager , not the client.
Securing individual workstations or small environments often requires a decentralized approach. While is famous for its enterprise-level management console, many scenarios—such as protecting isolated machines, home offices, or computers without a permanent network connection—call for an unmanaged client . Symantec Endpoint Protection Unmanaged Client Download