A Windows 10 update finally got me! Typically, I don't update until I've waited to see if it breaks things for others. But I broke my rule...

I grabbed the March update soon after release. Like a dummy, I did it on 3 of my main workstations. Well, over the past week I've had random applications just silently close on all 3 PCs!! Nothing in the event log, no prompts to save my work, nothing - window just closes silently, right in the middle of my work. The process is kicked out of memory, and restarting the app, like a browser, prompts to restore tabs. I've never seen such a bug before.

Turns out, some Googling around and I learn the update causes this exact issue for some people.

EDIT: No issues on any system since getting rid of that update the other day.