When i start the game up, the launcher says:

Client> 265 recipes
Client> 27 achievements
Client> 2013-05-23 18:22:07 [CLIENT] [INFO] Setting user: jbaubs
Client> 2013-05-23 18:22:07 [CLIENT] [INFO] (Session ID is 860ab34f0fdd09a9dfffcaaed58524a3396fb801)
Client> 2013-05-23 18:22:07 [CLIENT] [INFO] LWJGL Version: 2.9.0
Client> #
Client> # A fatal error has been detected by the Java Runtime Environment:
Client> #
Client> # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x5b37b60e, pid=1220, tid=8388
Client> #
Client> # JRE version: 7.0_21-b11
Client> # Java VM: Java HotSpot(TM) Client VM (23.21-b01 mixed mode windows-x86 )
Client> # Problematic frame:
Client> # C [ig7icd32.dll+0x3b60e]
Client> #
Client> # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
Client> #
Client> # An error report file with more information is saved as:
Client> # C:\Users\jack\AppData\Roaming\.minecraft\hs_err_pid1220.log
Client> #
Client> # If you would like to submit a bug report, please visit:
Client> # http://bugreport.sun.com/bugreport/crash.jsp
Client> # The crash happened outside the Java Virtual Machine in native code.
Client> # See problematic frame for where to report the bug.
Client> #
Client>
Client> [error occurred during error reporting , id 0xc0000005]
Client>
Game ended with bad state (exit code -1)
Deleting C:\Users\jack\AppData\Roaming\.minecraft\versions\13w21a\13w21a-natives-186017762601311
Couldn't delete C:\Users\jack\AppData\Roaming\.minecraft\versions\13w21a\13w21a-natives-186017762601311 - scheduling for deletion upon exit