Managing Auto-start
The Windows InterSystems service includes the instance name. After installing, by default the instance starts automatically when you start your server; this means the InterSystems IRIS instance is automatically configured to autostart (start when the system starts).
You can configure the instance not to autostart by changing the Start InterSystems IRIS on System Boot setting on the Memory and Startup page of the Management Portal (from the home page, select System Administration > Configuration > System Configuration > Memory and Startup).