A number of Exchange guys are posting in various forums about this error message that appears very early in the Exchange 2013 setup process. The solution is really simple. The issue is brought to light when you get the error message below during step...

Exchange admins who have installed Exchange 2010 using the command line will be familiar with the Setup.Com, which was part of the 2010 ISO/DVD. It doesn’t exist in Exchange 2013! In Exchange 2010, we used setup.exe to install the product using the GUI...