Once you’ve done all that you still have to find and download the other nine prerequisites. Once you do you are left with the question of whether to install the Beta or Release Candidate version. Try using your search engine to find an official Microsoft site where you can download that. You could download them manually, copy them to the server and install them. But what if your SharePoint server is behind a firewall or in a disconnected Virtual machine? How can you get the prerequisites installed then? You need this to be able to automatically download the 10 additional prerequisites that need to be installed BEFORE you can install SharePoint 2013. But all of these posts are written assuming that you SharePoint server can access the Internet. There are already several blog posts about how to install SharePoint 2013, so I won’t duplicate them here.