I was doing maintenance on our domain controllers a few weekends ago and one of our DCs in Sao Paulo was still downloading the updates (basically a two-cans-and-string internet there) and the server warned me I was about to be signed out because of an auto reboot (for the same maintenance).

I'm like "hell no this thing will take another 5 hours to install these fucking updates!"

Opened a command prompt, shutdown -a saved the day.