Hi ��Robert,��First, the option to execute pharo headless is ������headless��� (two ���-���, not just one). Maybe the help is bad :)But that will not solve your problem at all, since headless mode is fake and in case of windows it will open anyway a window (in the systray if you are lucky���).��However, I managed (some years ago, so do not ask for details ;) to run a pharo app as a service using this program:��http://rozanski.org.uk/serviceshere is an article that explains how to use it:��http://www.howtogeek.com/50786/using-srvstart-to-run-any-application-as-a-windows-service/(I do not remember how I did it and it would be nice if you can share your experience, so we can have documentation somewhere :P)Also I googled a bit and according to this:��http://stackoverflow.com/questions/3582108/create-windows-service-from-executable, looks like the ���microsoft��� way of doing it is using a command ���sc���. I suppose that command will not work if your program is not prepared for being a service, but you can give it a try (first approach *will* work, anyway :P)Hope this works��� please keep us informed.��Esteban