Just learned a great Microsoft Windows lesson.

There is a database program I like that I use in a Windows VM.  I was in the middle of  executing some commands when: BAM, windows update and restart.

What brilliant design Microsoft, of course the update should just suddenly take control mid-keystroke.

Those commands I was in the middle of could have been something critical. For instance when switching over from one system to another, the last step is often to quickly run a couple of commands to execute the changeover so that there is just a second or two of downtime.

“Ok, tell the request router to stop sending millions of users to the old system.”
“Now, tell it to point at the new… <WINDOWS UPDATE>”

So, never, ever do anything important in Windows.  And change your settings to not automatically apply updates.