Thank you for the post.
Please review page 13 of the FileMaker Server 13 Getting Started Guide:
"If you do not have the Microsoft Application Request Routing (ARR) extension for IIS installed, the FileMaker Server installer downloads and installs it. If your machine cannot access the Internet, you need to download and install this extension manually before the installer can continue. If IIS is not enabled, the ARR installer will enable it."
Thanks for the reply TSFalcon.
The point is that, although the Getting Started Guide is fine, the list of pre-requisites in the release notes is incomplete. In my cases, no error message appeared.