Check to see if you're using a 1.8 (or later) Java JDK to install. You
need to be using the Oracle Java JDK 1.7 to install and run ES4.You can
have multiple JDK's installed, just make sure that when you're running
the Configuration Manager that the one you want to use with us is first
on the path and that the JAVA_HOME environment variable points to it as
well.