dos not work!

I can't start minecraft on my PC.
(sorry 4 bad english)
I was going på play minecraft on my pc, and i was hoping that the bug was fixed

So I started minecraft, I loged inn, the game updateted and then it just disapeard! WTF?!
Steps to Reproduce:
1. Start minecraft!
2. Logg inn!
3. Then it just goves away!