SEP System Lockdown cannot block non-executable files.
SEP System Lockdown can block executable applications. It cannot block non-executable files.
SEP System lockdown can block executable files like.
Configuring system lockdownhttps://techdocs.broadcom.com/content/broadcom/techdocs/us/en/symantec-security-software/endpoint-security-and-management/endpoint-protection/all/Using-policies-to-manage-security/about-application-control-system-lockdown-and-devi-v36534292-d45e176/configuring-system-lockdown-v35628639-d45e1550.html