Only enterprise users (Windows 10 for business) can delay the installation of Windows updates.Windows Vista, Windows 7, Windows 8, Windows 8.1 Whenever you are prompted to reboot the computer, reboot the computer.
The only way to get it to shut down is to hold the physical power button down till it shuts down.
Since the introduction of Microsoft Windows 98, Microsoft has greatly improved the way users can update their computer.
I am running a P1, 166Mhz with 64 Meg memory on 8 Meg broadband and it works perfectly.
I could use a better video card but apart from that it's fine and it boots up faster than most XP machines.
Rebooting is an important step and in some cases may be required several times before you have installed all the Windows updates available.