Its really annoying, when some Anti-Virus software or application updates itself and requires a Windows restart. It is even more annoying when you have 50 windows opened and suddenly they start closing one by one. In such cases it is precious to know there is way to Cancel Windows Shutdown using command line:
Just press Windows (button) + R: type in;
and press enter.
That's it a quick cmd prompt will flash through the screen and Windows will stop shutdowning 🙂 Enjoy