You will typically use the Services GUI in Windows to configure the startup type for a service.

However, you can also use the Sc command to set the startup type from the command line:

sc config <service name> start=<mode>

For example,

sc config tlntsvr start=auto

automatically starts the tlntsvr service when you boot the system.

Possible start options are:

auto	the service will be automatically started at boot time, even if no user logs on
boot	the device driver will be loaded by the boot loader
demand	the service must be manually started (the default)
disabled	the service can’t be started
system	the service will be started during kernel initialization