Disabling Automatic Updates on Windows Server 2003, step-by-step
Windows comes with a built-in feature to keep your computer always up to date with windowsupdate by including a program called Automatic Updates. Personally, I want to know when I'm updating my server and not let some program do it for me, so in this case we would disable it.
Click the Start button, then right click My Computer and click Properties
Now, go to the Automatic Updates tab, and click the checkbox (to de-select) "Keep my computer up to date..." and click Apply then OK