want to start up with screen locked

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Hi,

When I start my WinXP machine, a bunch of scripts provided by our IT
people need to run. It takes non-trivial time.

I'd like to be able to start or log on and then walk away and get a cup
of coffee. But I'd like my screen to lock immediately so that no one
can access my machine through my keyboard while I'm down the hall at
the coffee machine.

I tried putting the screen-lock command into my Start folder, but
there's still a short bit of time after start-up or log-on before that
screen lock occurs. Is there anything I can do to get rid of that
short bit of time? (Run the screen-lock command from autoexec.bat?
Turn the screen-lock command into a service? Anything?)

TIA for any help ...

.