zabbix agent does not process %EnviromentVariables% which need to be used for localisation, like installing the agent to %ProgramFiles%\zabbix and so having "Include="%ProgramFiles%\zabbix\conf.d"" in the conf, and also use this in the userparameters, to tell where the scripts are "Userparameter="%ProgramFiles%\zabbix\scripts" etc.

also the Include Parameter does not allow for Directories, but just for files, which makes the feature quiet useless - i have to edit the main config anyway to include some more checks, unlike linux, where i just drop another config...