Ok, so when I launch MC, I have it set to OptiFine. It always crashes when I load the first like 4 times, but then works. But it never does this with 1.7.10. Can someone pls help?
Try going to %appdata% minecraft Versions delete the optifine and reinstall it that always works for me :3
I use optifine 1.8.3 and it works just fine. I'd try re-installing it and make sure to get a legit version.