This tool is a solution for that horrorneus "reboot in 5 minutes" - 
dialog. Nice thing is that even if you have unsaved work, windows will 
reboot - and all the unsaved work will be lost! Lovely!

The program is totally safe, it doesn't need installing. 

There are two buttons:
* Temporarily stop the nagging will stop the automatic updates service 
that will show the dialog. This stopping affects only until next reboot.

* Turn it off permanently - button will make a registry change 
(HKEY_LOCAL_MACHINE, 
\Software\Policies\Microsoft\Windows\WindowsUpdate\AU','NoAutoRebootWithLoggedOnUsers' 
is set to 1). Ironically (?) you need to reboot to make this change 
affect! 

If you face the nag-window, just start the program and click both 
buttons. That way you will never ever see the dialog again.


http://kichik.net/2007/06/28/genuinely-later/
http://blogs.msdn.com/tim_rains/archive/2004/11/15/257877.aspx