On Tue, 12 Feb 2019 11:21:40 -0500, micky
wrote:

I'm using win10 and usually restart to update pretty quickly, but this
time when it asked for now, set a time, or Later, twice I chose later.

This morning, I saw that the computer had restarted. It must have,
because no programs were open. Maybe there was a short power failure.

Event Viewer should have an entry about an unplanned shutdown (or words
to that effect) if it was a crash.