Minecraft keeps crashing

I didn't lauch minecraft for a while (maybe since 1.8)
So i wanted to play it for some reasons .
I uptated it to the last version (1.11)
But everytime i lauch the game , the launcher disappear (which i think is normal) and 2 minutes after , the launcher reappear and tell me that minecraft crashed.
It keeps happenning and i can't solve it.
I request help
Thanks