My minecraft problem

Ok so I first try to play Minecraft after not playing for a week then every time when would finish loading it would go straight to the "crash report" page then after restarting my mc a few times it works. Then I try to join a server with my friends and a few minutes (or seconds) later it crashes again I have been restarting it but no improvements. this problem effects Minecraft 1.10 - 1.11.2