Silent installations use a response file (file.iss) for the responses to prompts during the installation process. This eliminates the need for any user interaction during the installation process, and allows you to quickly and easily copy duplicate installations across your network. Information about the status of the silent installation can be recorded in a log file (file.log).
setup -s -f1d:\dir\file.iss -f2d:\dir\file.log
where: