My minecraft has been crashing everytime the main menu appears. my drivers are also up to date. it was working great the last time i used it which was around two weeks ago. I havent done anything really so im not sure why its crashing. 

here are the logs:

[10:11:13] [Client thread/INFO]: Setting user: _PrettyBear
[10:11:14] [Client thread/WARN]: Skipping bad option: lastServer:
[10:11:14] [Client thread/INFO]: LWJGL Version: 2.9.4
[10:11:14] [Client thread/INFO]: Reloading ResourceManager: Default
[10:11:39] [Sound Library Loader/INFO]: Starting up SoundSystem...
[10:11:39] [Thread-3/INFO]: Initializing LWJGL OpenAL
[10:11:39] [Thread-3/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[10:11:40] [Thread-3/INFO]: OpenAL initialized.
[10:11:40] [Sound Library Loader/INFO]: Sound engine started
[10:11:42] [Client thread/INFO]: Created: 1024x512 textures-atlas
[10:11:44] [Client thread/INFO]: Narrator library for x86 successfully loaded