minecraf crashes when i click multiplayer button

here is a crash log:
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # A fatal error has been detected by the Java Runtime Environment:
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000180054795, pid=3396, tid=4676
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)
[22:16:11 INFO]: Client> # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.51-b03 mixed mode windows-amd64 compressed oops)
[22:16:11 INFO]: Client> # Problematic frame:
[22:16:11 INFO]: Client> # C [winsflt.dll+0x54795]
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # An error report file with more information is saved as:
[22:16:11 INFO]: Client> # C:\Users\admin\AppData\Roaming\.minecraft\hs_err_pid3396.log
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> # If you would like to submit a bug report, please visit:
[22:16:11 INFO]: Client> # http://bugreport.sun.com/bugreport/crash.jsp
[22:16:11 INFO]: Client> # The crash happened outside the Java Virtual Machine in native code.
[22:16:11 INFO]: Client> # See problematic frame for where to report the bug.
[22:16:11 INFO]: Client> #
[22:16:11 INFO]: Client> AL lib: (EE) alc_cleanup: 1 device not closed
[22:16:11 ERROR]: Game ended with bad state (exit code 1)
[22:16:11 INFO]: Deleting C:\Users\admin\AppData\Roaming\.minecraft\versions\1.7.7\1.7.7-natives-4021153814095
[22:16:11 WARN]: Couldn't delete C:\Users\admin\AppData\Roaming\.minecraft\versions\1.7.7\1.7.7-natives-4021153814095 - scheduling for deletion upon exit
[22:16:11 INFO]: Ignoring visibility rule and showing launcher due to a game crash