David Berlind caught Vista in the act of installing updates and then automatically shutting down with no ability for the user to pause the process.
This actually happened to me the other day, but on XP, the laptop in use for a presentation caught a wiff of the wireless network, grabbed itself an update off the net, and then the presentation just froze while Windows decided to install the update. No warning, no way to pause the process and regain control of the computer. We had to get another laptop before we could resume.
And to think this company manages to sell server software?