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Client> # A fatal error has been detected by the Java Runtime Environment:
Client> #
Client> # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x43700000, pid=1236, tid=3300
Client> #
Client> # JRE version: Java(TM) SE Runtime Environment (7.0_45-b18) (build 1.7.0_45-b18)
Client> # Java VM: Java HotSpot(TM) Client VM (24.45-b08 mixed mode, sharing windows-x86 )
Client> # Problematic frame:
Client> # C 0x43700000
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> # D:\Documents and Settings\Administrator\Application Data\.minecraft\hs_err_pid1236.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> AL lib: (EE) alc_cleanup: 1 device not closed
Game ended with bad state (exit code 1)
Ignoring visibility rule and showing launcher due to a game crash
Deleting D:\Documents and Settings\Administrator\Application Data\.minecraft\versions\2\2-natives-31497956915507
Couldn't delete D:\Documents and Settings\Administrator\Application Data\.minecraft\versions\2\2-natives-31497956915507 - scheduling for deletion upon exit

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X-Ray mods and Optifine usually do not mix. Pick one and drop the other. I suggesting keeping the latter and drop the former. Most servers worth their salt have anti-xray plugins anyways.