What is the most logical next event?

How to understand computer system security needs
Analyze the operating system on the machine (s).
Security requirements will vary depending on which os and which version you are running. Make sure that the latest service packs and patches are installed.
Analyze the environment in which your system will operate. If your machine will not be in any local network and will never be connected to the internet, then you can be relatively sure of the system security.