My game keeps closing to desktop without explanations -_-‘’

it doesn’t matter what I do, I’ve tried everything, the game just closes without any notice, either in 5 minutes or in 20 minutes, it’s totally random but the game just closes as if you used the command alt + f4

-__-"

it happens a lot to me when I alt + tab to browser

In the past this did not happen, but today it also happens to me =/