How to stop windows from auto restart after auto update

One thing that I really hate about Vista (or maybe it is windows update) is that it will automatically reboot my system at night without my agreement. I am all for having the latest update, but it has destroyed my works many times already. Sometimes I wrote down quick note in notepad as a quick todo list, and I usually have firefox opened up a number of website to do my work. Today I woke up and see them all gone again. AARRrrrrr..

So I found out a quick group policy option from the internet to disable auto-restart. Do it now if you use windows.

Mac OSX becomes more appealing to me again.