Trying to install sql_server_2014_enterprise_edition_x64_dvd Windows 7(Ultimate) 64Bit OS
First of all I think you should be installing Developer Edition as Windows 7 is not a server-OS.  Make sure you have admin rights on your machine.  It may also be worth trying the different install media? 

However it looks like there is an open connect item for this error and further discussion here

As a workaround, you could use some of your Azure credits to spin up one of the pre-prepared VMs which already have SQL Server 2014 installed, or try Express edition.