Has anyone else noticed the way that windows update will update itself and then decide that you want to reboot the machine, and does it for you?

That's the third time it's happened while I have work open. And the best bit is there doesn't seem to be a way to turn it off - you can tell it to prompt you to upgrade, but as soon as it's done it will say 'Do you want to reboot now?', and ask it every 5 minutes. And if you're working on another computer when that message pops up and you miss it, the machine reboots.

Well, at least my work was saved this time.