It’s interesting to see this post about a stubborn, automated reboot in Vista. I haven’t setup my Vista testbed machine yet, but I’ve seen a shutdown countdown on older Windows. You can even provoke it by accidentally ending the wrong process.
That’s how I learned about “shutdown /a” for aborting such a thing (by being quick with the Run line). I wonder if it works in Vista as well. This KB article describes the switches as applicable to Windows 2000,
Guess I’ll find out, if Vista does the shutdown thing to me, or if I can provoke it.