On Windows Server 2025 the Windows Security Center reports "No active Antivirus provider. Your device is vulnerable." despite Symantec Endpoint Protection (SEP) or Symantec Endpoint Security being installed.
Server 2025
SEP/SES 14.3 RU9 and later.
A bug in Windows Server 2025.
This issue is under investigation to determine if there is workaround which can be implemented in the Security agent to address the issue.