How to specify java version in windows

I am running 3.5.11 on a Windows server that has multiple versions of Java installed to support various apps. Neo4j service used to work fine but will no longer start. The logs reveal that it is trying to instantiate jdk-12.0.1 when I want it to utilize the jdk1.8.0_221 version (which is where the JAVA_HOME environment variable points to but Neo4j doesn't seem to be getting its direction from there). The neo4j.conf does not appear to have a setting for this. I found a post on how to specify the version in FreeBSD but not Windows. TIA for your help!