Nothing like finding your computer has automatically rebooted! Yes, you can change that setting. Head over to PC World and read this easy how-to on changing these settings.
I'll bet good money this has happened to you: You step away from the computer for a little while, and when you come back, all your windows and work are gone.
What happened? Windows, that's what. Windows Update downloaded some updates and took it upon itself to reboot without your permission.
This should never happen. Never, ever, ever. It doesn't matter that Windows is attempting to keep itself secure and fine-tuned and all that; under no circumstances should an operating system reboot without permission.
At best, it's a hassle. At worst, you stand to lose any work you haven't saved.
Thankfully, there's an easy fix for this, and I'm kicking myself for not applying it sooner. If you've been plagued by the same problem, here's what you need to do:
Read more at: Stop Windows' Automatic Updates from Rebooting Your PC