Ignore step 2 of the "Securing Apache" section and you have yourself a web server open to the Internet.

It is advisable that you nail down your Apache configuration by doing the following:
  • Set up a virtual server to handle all requests and put the DocumentRoot into another directory. Preferably on another drive.
  • Allow only one directory where cgi programs can run.
  • Make a backup of important data, just in case.

I wouldn't advise that you put any kind of public web site on a Windows server. When Apache is running as Administrator, exploits which allow control of the PC could result in serious problems, in my opinion, there is no way to run Apache securely on Windows as a public web server, which is why I left it out of the tutorial.