You have incorrectly specified your JAVA_HOME variable. You set it to
JAVA_HOME=C:\java\jre7\bin
whereas you want it without the bin directory, i.e. just
JAVA_HOME=C:\java\jre7
However, this is my recollection that JBoss needs a JDK, not a JRE. If it works, great; if not, then you will need to download the JDK instead , and if you installed this, install JAVA_HOME in the root JDK install path, for example
JAVA_HOME=C:\java\jdk1.7.0_25
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