Look for files labeled Symantec_Endpoint_Protection_ProductVersion_All_Clients_language.zip . This contains specific 32-bit and 64-bit installers for Windows and Mac.
If you need a free unmanaged endpoint solution, consider Microsoft Defender for Endpoint (free tier) or ClamAV. But for enterprise-grade SEP, pay for the license. Symantec Endpoint Protection Unmanaged Client Download
Select Unmanaged Client – this is critical. Do not select "Managed Client" unless you have a SEPM server. Symantec Endpoint Protection Unmanaged Client Download
: Ensure "Run LiveUpdate" is selected so the client can pull virus definitions directly from Symantec's public servers over the internet. Symantec Endpoint Protection Unmanaged Client Download