Minecraft crashes everytime I try to play today

What I expected to happen was...:
I could click play and be able to play

*What actually happened was..
The screen closes suddenly and crashes.

Steps to Reproduce:
1. connect to server
crash
2. ...
3. ...
[19:51:36] [Client thread/INFO]: Setting user: cow_tools
[19:51:36] [Client thread/INFO]: (Session ID is token:80c703a712d14cbc818921e199099ab4:41c1fa8a6e7847128a1c62a1d16182f8)
[19:51:41] [Client thread/INFO]: LWJGL Version: 2.9.4
[19:51:44] [Client thread/INFO]: Reloading ResourceManager: Default
[19:51:45] [Sound Library Loader/INFO]: Starting up SoundSystem...
[19:51:45] [Thread-6/INFO]: Initializing LWJGL OpenAL
[19:51:45] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
[19:51:46] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'
[19:51:46] [Thread-6/ERROR]: Unable to initialize OpenAL. Probable cause: OpenAL not supported.
[19:51:46] [Thread-6/WARN]: ERROR MESSAGE:
[19:51:46] [Thread-6/INFO]: Could not locate OpenAL library.
[19:51:46] [Thread-6/WARN]: STACK TRACE:
[19:51:46] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:156)
[19:51:46] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:102)
[19:51:46] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:206)
[19:51:46] [Thread-6/INFO]: paulscode.sound.libraries.LibraryLWJGLOpenAL.init(LibraryLWJGLOpenAL.java:164)
[19:51:46] [Thread-6/INFO]: paulscode.sound.SoundSystem.CommandNewLibrary(SoundSystem.java:1576)
[19:51:46] [Thread-6/INFO]: paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2572)
[19:51:46] [Thread-6/INFO]: paulscode.sound.CommandThread.run(CommandThread.java:121)
[19:51:46] [Sound Library Loader/WARN]: ERROR MESSAGE:
[19:51:46] [Sound Library Loader/INFO]: Could not locate OpenAL library.
[19:51:46] [Sound Library Loader/INFO]: Starting up SoundSystem...
[19:51:46] [Thread-8/INFO]: Switching to No Sound
[19:51:46] [Thread-8/INFO]: (Silent Mode)
[19:51:46] [Sound Library Loader/INFO]: Sound engine started
[19:51:51] [Client thread/INFO]: Created: 512x512 textures-atlas
[19:52:00] [Client thread/INFO]: Connecting to mc.mcorigins.com, 25565
[19:52:07] [Client thread/INFO]: [CHAT] You have no new mail.