I have just finished a wedding and have close to 900 photos to process, I use Win 10 and this machine I use LR on is dedicated to LR and is mission critical with no other non photo software on it.
I was doing spot removals, and cropping when the program went non-responding. I was not using the brush or other intensive edits so this is most concerning. It has terminated 2x in the last 2 hours!
I depend on LR for my business and can't continue to work like this.
Can you post your System Info here so we can narrow down the issue? Help > System Info > Copy and paste here.
When it "went unresponsive" and "terminated," did it freeze and then crash? Was there a crash report generated? Did you submit a crash report? Any error messages?
Let us know!