Windows Vista: Prevent Automatic Rebooting From Windows Update

Its very annoying if you leave your computer on at night with unsaved work on it, and come to it in the morning and find that it was rebooted. When new patches are downloaded and installed on your computer by Windows Update (if you have it enabled) this feature will automatically reboot your system. So if you have any unsaved work, you will lose it.If you want to know how to prevent Windows