Basically after Logging into minecraft my game would sit at the Mojang Logo on start up. Then It would say not responding and give me a "crash" report.

Put the summary of the bug you're having here

What I expected to happen was...:
The game would start up and go.

What actually happened was...:
Game froze, Carshed, and gave me a error.

Steps to Reproduce:
1. I started up game.
2. log in
3. game break