I can't play!

I can't play on my pc! Every time i play, i am playing for a few seconds, but then crashes. It says i got the "Exit Code 255"
Please help solve that problem.

What I expected to happen was...:
...that i just were able to play normaly.

What actually happened was...:
...that i crash and get the "Exit Code 255"

Steps to Reproduce:
1. i open up minecraft normaly
2. i go to multyplayers
3. i go to the server i want to play, and then it crashes and i get the "Exit Code 255"