Java SE Binary not even enabled still crashing

So how is this fixed? My son is losing his mind over this error for the past 6 months.He played for about 3 months, and now it won't load. I have uninstalled Java and reinstalled it, same with MC, and after 2 minutes "Java SE binary has stopped working" shows up and then the game goes to the log saying" needed to grow bufferbuild buffer". I have seen this all over the internet, but no one knows how to fix it. All the forums say it is working as intended, how is that possible when I cannot play the game?