when i launch minecraft 1.8.1 it goes back to the launcher and says this
[12:13:32] [Client thread/INFO]: Setting user: junhosteve
[12:13:32] [Client thread/INFO]: (Session ID is token:7b9702959864451895d29470890bb560:fbf9787de9964885ab8f1c27b5bf0a9a)
[12:13:35] [Client thread/INFO]: LWJGL Version: 2.9.1
[12:13:36] [Client thread/INFO]: Reloading ResourceManager: Default
[12:13:37] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:13:37] [Thread-6/INFO]: Initializing LWJGL OpenAL
[12:13:37] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[12:13:37] [Thread-6/INFO]: OpenAL initialized.
[12:13:38] [Sound Library Loader/INFO]: Sound engine started
[12:13:42] [Client thread/INFO]: Created: 512x512 textures-atlas
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000005a7055ec, pid=2544, tid=2976
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3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C [ig4dev64.dll+0x55ec]
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\namjin lee\AppData\Roaming\.minecraft\hs_err_pid2544.log
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10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
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    AL lib: (EE) alc_cleanup: 1 device not closed
    Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release