Yeah I saw that, it's basically the status quo on Windows though :( Happens all the time that people return from a break and find their machine decided to reboot. Luckily on Managed PCs you can stop this from happening.
I keep a Windows machine around for mainly games, and this is the very first thing I'd do on a new Windows installation. Run "gpedit.msc", find the "automatic updates" policy and disable everything.
Then it only sends you a notification once in a while, and that's it.
Then it only sends you a notification once in a while, and that's it.
afaik you can do this on Win10 Pro and above.