I just installed pyspark 2.2.0 using conda (using python v3.6 on windows 7 64bit, java v1.8)
$conda install pyspark
It downloaded and seemed to
It seems to be a Java path problem.
I had the same issue and had exactly the same response, and JAVA_HOME path was not set.
Check this page and see Moustafa Mahmoud's answer. I only had to take care of suggestion 1. (JAVA_HOME variable).
Also see link as well.