WINDOWS connection is used to analyze apps hosted in Qlik Sense Enterprise on Windows (QSEoW) server.
Connection to Qlik Sense is made using the userid that is running the QSDA service. This is useful when QSDA is installed in non-admin mode. The QSDA process will be started by the current windows user and that current user will be used to connect to Qlik Sense. This userid must have a Qlik Sense license.