Les services

Dans HKLM\SYSTEM\CurrentControlSet\Services

Error Control Meaning

Level

0x3 (Critical) Fail the attempted system startup.
If the startup is not using the
LastKnownGood control set, switch to
LastKnownGood. If the startup attempt
is using LastKnownGood, run a bug-check
routine.

0x2 (Severe) If the startup is not using the
LastKnownGood control set, switch to
LastKnownGood. If the startup attempt
is using LastKnownGood, continue on
in case of error.

0x1 (Normal) If the driver fails to load or initialize,
startup should proceed, but display a
warning.

0x0 (Ignore) If the driver fails to load or initialize,
start up proceeds. No warning is displayed.

Start

START TYPE // LOADER // MEANING

0x0 //Kernel // Represents a part of the
(Boot) driver stack for the boot
(startup) volume and must
therefore be loaded by the
Boot Loader.

0x1 //I/O // Represents a driver to be loaded
(System) subsystem at Kernel initialization.

0x2 //Service // To be loaded or started
(Auto load) Control automatically for all startups,
Manager regardless of service type.

0x3 //Service // Available, regardless of type,
(Load on Control but will not be started until
demand) Manager the user starts it (for example,
by using the Devices icon in
Control Panel).

0x4 //Service // NOT TO BE STARTED UNDER ANY
(disabled) Control CONDITIONS.
Manager

source : http://support.microsoft.com/kb/103000