JAVA_HOME is an unnecessary variable, as this can be detected from the running java program. setting it causes subsequent errors, like the microsoft vscode java plugin thinks all of a sudden JAVA_HOME should be used to detect an installed java, instead of just looking into the path, resp running java.

but, openjdk should set a link so the path can be set sometimes to java-21 and java-17 with ease, e.g. /program-files/openjdk-21 pointing to /program-files/Microsoft\jdk-21.0.4.7-hotspot\bin