The FireDaemon Pro's GUI must be run as an administrator to function correctly on Windows XP and Windows 2003 Server. On Windows Vista, 2008 and 7 the GUI's elevate correctly so the user should not need to be an administrator. Services can be run as any user, however the privilege of that user will determine whether the service can interact with the desktop, access network resources and so forth. As a rule of thumb services should be run as Localsystem (that's the default). If network access is required then generally run your service as an administrator. FireDaemon will automatically grant user accounts "Log on as Services" rights.