Prevent Automatic Reboots In Vista
Windows Update is a lifesaver for those of us who are not diligent in keeping our computers up-to-date with the latest fixes, patches, etc. However, the dialog box that constantly pops up after an update is installed reminding me to restart my computer is an annoyance, especially when I’m in the middle of something.
Eventually though, Windows gets annoyed with me and simply indicates that my computer will reboot in 5 minutes. To prevent this from happening, without having to temporarily disable Windows Update, you can disable automatic reboots from happening when a user is logged on. To accomplish this in Vista:



