In the end of the day, Windows under no condition reboot without user demand 
because of user-mode code.

----- Original Message ----- 
From: "Angus Robertson - Magenta Systems Ltd" <[EMAIL PROTECTED]>
To: <twsocket@elists.org>
Sent: Thursday, September 07, 2006 12:13 PM
Subject: Re: [twsocket] Need help with TServiceApplication


:> So perhaps we should assume Services are more kernel-level than
: > user-level in terms of being able to crash Windows?!
:
: There are service applications and service drivers, the latter are
: obviously running at a lower level but can not be created using Delphi.
:
: Service applications are no different to interactive applications,
: except for recognising extra control messages.  But if they misbehave on
: start-up, Windows will wait 30 seconds or more for a response delaying
: the boot process.  If other services are dependent on ones that won't
: start, they won't run either.
:
: The worst case I've seen was two years ago when a Sun Java runtime
: timebomb (an expired certificate) caused any programs needed the runtime
: to hang, including the APC power management drivers used to power down
: PCs when batteries are failing, which somehow caused several other
: services to die, in thousands of servers around the world, on the same
: day.  Moral is never trust any program dependencies, runtimes in
: particular, like Java, Perl or .net.
:
: Angus
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