The Host Package Installer can only be used in conjunction with the CB Protection Server version 8.1.4 or later. You upload this package to the CB Protection Server using the instructions provided in the CB Protection 8.5.2 User Guide.
Depending on your CB Protection Server version, you may need to run the Certificate Installer before installing the 8.5.0 Windows agent. You can see more information about the Certificate Installer here.
For all new 8.1.4 and above installations and for upgrades that want the latest rules, a rules installer must also be uploaded to the server.