This
means protect the hard disk at the file and directory level by controlling
what files may be created, deleted, modified, or executed. For example, you
could make the entire Windows directory tree READ-ONLY and prevent any
changes (or additions) to the Windows system files. By not allowing any
directory to have both write access and execute access
effectively limits what programs may be executed. Since ultimately
everything that changes on the computer is at the hard disk level this type
of security provides the most protection. This method of security is similar
to the way operating systems such as UNIX and NetWare provide
security.