Have you validated you can run Stardog in your environment via the batch file, i.e. stardog-admin.bat server start?
(2) Right click -> Compatibility -> Run as administrator
FYI with respect to your configuration, you may run up on memory limits depending on the amount of memory dedicated to Stardog, the size of the databases you use, the amount consumed by Windows, and anything else on your machine. By default, if the STARDOG_JAVA_ARGS is not set, it will initialize the JVM heap with 2GB.
Feel free to either change the envrionment variable or remove the "-Xmx2g and -Xms2g" from the stardog-admin.bat and stardog.bat files.