Board Thread:Questions and Answers/@comment-121.216.152.156-20130212072939/@comment-6294495-20130212134934

I think many of us have had this happen at some time. Did you try shutting down your computer? Do you have too much RAM allocated to minecraft and not enough for the operating system? It's hard to say when you haven't given any details. I'm pretty sure your "world" didn't say CRASH. What does your screen do when you start up the game?

Does the game let you start a new world? If so, and your old world still crashes you may be out of luck. If you cannot even start a new world or even get to the main screen, I would try backing up the Saves file in .technicpack then delete .technicpack and re-install everything.

Do some research. You tube has some good tutorials.