You want to know more about controlling the content cache.
Symantec Endpoint Protection supports updates to its data and engines in the field. These updates are collectively referred to as "content".
More information: Content Delivery to the Symantec Endpoint Protection Client
Symantec Endpoint Protection Clients cache their installation files to improve product update performance at the expense of client disk space. This can be optionally disabled.
CACHE_INSTALLER=0at the end of the line that begins
CACHEINSTALL, which was used in 11.0x.
CACHED_INSTALLS="PATH"at the end of the line that begins
msiexec /i "Symantec Antivirus.msi" CACHE_INSTALLER=0
msiexec /i "Symantec Antivirus.msi" CACHED_INSTALLS="PATH"