Values:
START_MODE_UNSPECIFIED (0):
Start mode unspecified.
BOOT (1):
The service is a device driver started by the
system loader.
SYSTEM (2):
The service is a device driver started by the
IOInitSystem function.
AUTO (3):
The service is started by the operating
system, at system start-up
MANUAL (4):
The service is started only manually, by a
user.
DISABLED (5):
The service is disabled.
