Minecraft beta probleme

Bonjour,

Lorsque je joue à minecraft sur mon ordinateur portable dell sous windows xp sp2, au bout de 10 minutes environ minecraft se ferme automatiquement (à noter qu'il devient de plus en plus lent et qu'il "rame" de plus en plus au fur et à mesure que le temps s'écoule) et un fichier bloc note : hs_err_pid2276 ou 3908 ou 2936 apparait.
Voici son contenu:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x532ac059, pid=2276, tid=1760
#
# JRE version: 6.0_26-b03
# Java VM: Java HotSpot(TM) Client VM (20.1-b02 mixed mode windows-x86 )
# Problematic frame:
# C [OpenAL32.dll+0xc059]
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x48c01000): VMThread [stack: 0x48c90000,0x48ce0000] [id=1760]

siginfo: ExceptionCode=0xc0000005, reading address 0x533ff120

Registers:
EAX=0x533ff120, EBX=0x532a0000, ECX=0x533e3f80, EDX=0x038e0000
ESP=0x48cdf9f4, EBP=0x48cdfa50, ESI=0x533e3f60, EDI=0x533e3f30
EIP=0x532ac059, EFLAGS=0x00010202


Top of Stack: (sp=0x48cdf9f4)
0x48cdf9f4: 00000001 533e3f30 532a6db2 533e3f30
0x48cdfa04: 00000000 532a6dee 533e3f30 532a6e1f
0x48cdfa14: 532b0328 532a0000 00000000 00000001
0x48cdfa24: 20280369 00000000 48cdfa70 001b4928
0x48cdfa34: 00000001 48cdfa24 48cdf608 48cdfaf0
0x48cdfa44: 532b1ff0 3bc91f09 00000000 48cdfa5c
0x48cdfa54: 532b03d0 532a0000 48cdfa7c 7c91118a
0x48cdfa64: 532a0000 00000000 00000001 001b4928

Instructions: (pc=0x532ac059)
0x532ac039: 00 00 c9 c3 56 57 8b 7c 24 0c 8b 77 20 ff 76 10
0x532ac049: c7 46 0c 01 00 00 00 e8 4f f0 ff ff 8b 46 08 59
0x532ac059: 8b 08 50 ff 51 08 8b 46 04 85 c0 74 06 8b 08 50
0x532ac069: ff 51 08 8b 06 8b 08 50 ff 51 08 56 e8 70 0d 00


Register to memory mapping:

EAX=
[error occurred during error reporting (printing register info), id 0xc0000005]

Stack: [0x48c90000,0x48ce0000], sp=0x48cdf9f4, free space=318k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [OpenAL32.dll+0xc059]
C [OpenAL32.dll+0x103d0]
C [ntdll.dll+0x118a]
C [ntdll.dll+0x2419a]
C [kernel32.dll+0x1cd86]
C [kernel32.dll+0x1cdfe]
C [msvcr71.dll+0x8d04]
C [msvcr71.dll+0x8d11]
V [jvm.dll+0x11da2d]
V [jvm.dll+0x11cd4e]
V [jvm.dll+0x11d070]
V [jvm.dll+0x11d472]
V [jvm.dll+0x1411ac]
C [msvcr71.dll+0x9565]
C [kernel32.dll+0xb699]

VM_Operation (0x4938f090): Exit, mode: safepoint, requested by thread 0x48f85400


--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x5e420c00 JavaThread "Thread-186" [_thread_blocked, id=380, stack(0x58790000,0x587e0000)]
0x49bb9800 JavaThread "Thread-12" daemon [_thread_blocked, id=2496, stack(0x53250000,0x532a0000)]
0x49c4a400 JavaThread "Thread-11" daemon [_thread_blocked, id=1348, stack(0x53200000,0x53250000)]
0x48fba800 JavaThread "Thread-10" daemon [_thread_in_native, id=3304, stack(0x531b0000,0x53200000)]
0x48fb5400 JavaThread "Minecraft main thread" daemon [_thread_in_native, id=3992, stack(0x497e0000,0x49830000)]
0x48fc5800 JavaThread "Timer hack thread" daemon [_thread_blocked, id=1580, stack(0x495f0000,0x49640000)]
0x49026400 JavaThread "TimerQueue" daemon [_thread_blocked, id=1268, stack(0x494d0000,0x49520000)]
0x003f6800 JavaThread "DestroyJavaVM" [_thread_blocked, id=2616, stack(0x008d0000,0x00920000)]
0x48f85400 JavaThread "AWT-EventQueue-0" [_thread_blocked, id=2924, stack(0x49340000,0x49390000)]
0x48f59400 JavaThread "AWT-Shutdown" [_thread_blocked, id=3760, stack(0x49200000,0x49250000)]
0x48f58400 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=3716, stack(0x491b0000,0x49200000)]
0x48c27c00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=2500, stack(0x48e70000,0x48ec0000)]
0x48c19000 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=3552, stack(0x48e20000,0x48e70000)]
0x48c17800 JavaThread "Attach Listener" daemon [_thread_blocked, id=936, stack(0x48dd0000,0x48e20000)]
0x48c16400 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=3936, stack(0x48d80000,0x48dd0000)]
0x48c09800 JavaThread "Finalizer" daemon [_thread_blocked, id=1584, stack(0x48d30000,0x48d80000)]
0x48c04c00 JavaThread "Reference Handler" daemon [_thread_blocked, id=3160, stack(0x48ce0000,0x48d30000)]

Other Threads:
=>0x48c01000 VMThread [stack: 0x48c90000,0x48ce0000] [id=1760]

VM state:at safepoint (shutting down)

VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event])
[0x003f5660] Threads_lock - owner thread: 0x48c01000

Heap
def new generation total 58880K, used 34102K [0x029d0000, 0x069b0000, 0x17f20000)
eden space 52352K, 60% used [0x029d0000, 0x048ec128, 0x05cf0000)
from space 6528K, 34% used [0x05cf0000, 0x05f219e0, 0x06350000)
to space 6528K, 0% used [0x06350000, 0x06350000, 0x069b0000)
tenured generation total 130716K, used 112563K [0x17f20000, 0x1fec7000, 0x429d0000)
the space 130716K, 86% used [0x17f20000, 0x1ed0ccd8, 0x1ed0ce00, 0x1fec7000)
compacting perm gen total 15104K, used 14917K [0x429d0000, 0x43890000, 0x469d0000)
the space 15104K, 98% used [0x429d0000, 0x43861558, 0x43861600, 0x43890000)
No shared spaces configured.

Code Cache [0x00950000, 0x00d40000, 0x02950000)
total_blobs=2058 nmethods=1744 adapters=247 free_code_cache=29439616 largest_free_block=0

Dynamic libraries:
0x00400000 - 0x00424000 C:\Program Files\Java\jre6\bin\javaw.exe
0x7c910000 - 0x7c9c9000 C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c905000 C:\WINDOWS\system32\kernel32.dll
0x64d00000 - 0x64d34000 C:\Program Files\AVAST Software\Avast\snxhk.dll
0x77da0000 - 0x77e4c000 C:\WINDOWS\system32\ADVAPI32.dll
0x77e50000 - 0x77ee2000 C:\WINDOWS\system32\RPCRT4.dll
0x77fc0000 - 0x77fd1000 C:\WINDOWS\system32\Secur32.dll
0x77d10000 - 0x77da0000 C:\WINDOWS\system32\USER32.dll
0x77ef0000 - 0x77f38000 C:\WINDOWS\system32\GDI32.dll
0x76320000 - 0x7633d000 C:\WINDOWS\system32\IMM32.DLL
0x7c340000 - 0x7c396000 C:\Program Files\Java\jre6\bin\msvcr71.dll
0x6d7f0000 - 0x6da9f000 C:\Program Files\Java\jre6\bin\client\jvm.dll
0x76ae0000 - 0x76b0f000 C:\WINDOWS\system32\WINMM.dll
0x6d7a0000 - 0x6d7ac000 C:\Program Files\Java\jre6\bin\verify.dll
0x6d320000 - 0x6d33f000 C:\Program Files\Java\jre6\bin\java.dll
0x76ba0000 - 0x76bab000 C:\WINDOWS\system32\PSAPI.DLL
0x6d7e0000 - 0x6d7ef000 C:\Program Files\Java\jre6\bin\zip.dll
0x6d000000 - 0x6d14b000 C:\Program Files\Java\jre6\bin\awt.dll
0x72f50000 - 0x72f76000 C:\WINDOWS\system32\WINSPOOL.DRV
0x77be0000 - 0x77c38000 C:\WINDOWS\system32\msvcrt.dll
0x774a0000 - 0x775dc000 C:\WINDOWS\system32\ole32.dll
0x77390000 - 0x77492000 C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2180_x-ww_a84f1ff9\COMCTL32.dll
0x77f40000 - 0x77fb6000 C:\WINDOWS\system32\SHLWAPI.dll
0x5b090000 - 0x5b0c8000 C:\WINDOWS\system32\uxtheme.dll
0x74690000 - 0x746db000 C:\WINDOWS\system32\MSCTF.dll
0x75140000 - 0x7516e000 C:\WINDOWS\system32\msctfime.ime
0x7c9d0000 - 0x7d1f4000 C:\WINDOWS\system32\shell32.dll
0x6d230000 - 0x6d27f000 C:\Program Files\Java\jre6\bin\fontmanager.dll
0x6d600000 - 0x6d613000 C:\Program Files\Java\jre6\bin\net.dll
0x719f0000 - 0x71a07000 C:\WINDOWS\system32\WS2_32.dll
0x719e0000 - 0x719e8000 C:\WINDOWS\system32\WS2HELP.dll
0x6d620000 - 0x6d629000 C:\Program Files\Java\jre6\bin\nio.dll
0x71990000 - 0x719d0000 C:\WINDOWS\System32\mswsock.dll
0x76ed0000 - 0x76ef7000 C:\WINDOWS\system32\DNSAPI.dll
0x49390000 - 0x493b8000 C:\WINDOWS\system32\rsaenh.dll
0x76d10000 - 0x76d29000 C:\WINDOWS\system32\iphlpapi.dll
0x76960000 - 0x76a15000 C:\WINDOWS\system32\USERENV.dll
0x6fee0000 - 0x6ff34000 C:\WINDOWS\system32\netapi32.dll
0x76f60000 - 0x76f68000 C:\WINDOWS\System32\winrnr.dll
0x76f10000 - 0x76f3d000 C:\WINDOWS\system32\WLDAP32.dll
0x76f70000 - 0x76f76000 C:\WINDOWS\system32\rasadhlp.dll
0x62e40000 - 0x62e99000 C:\WINDOWS\system32\hnetcfg.dll
0x719d0000 - 0x719d8000 C:\WINDOWS\System32\wshtcpip.dll
0x6d780000 - 0x6d788000 C:\Program Files\Java\jre6\bin\sunmscapi.dll
0x779e0000 - 0x77a76000 C:\WINDOWS\system32\CRYPT32.dll
0x77a80000 - 0x77a92000 C:\WINDOWS\system32\MSASN1.dll
0x49830000 - 0x4989b000 C:\Documents and Settings\Jean.JEANBIGBOSS-234\Application Data\.minecraft\bin\natives\lwjgl.dll
0x5f070000 - 0x5f13c000 C:\WINDOWS\system32\OPENGL32.dll
0x6cef0000 - 0x6cf11000 C:\WINDOWS\system32\GLU32.dll
0x736b0000 - 0x736f9000 C:\WINDOWS\system32\DDRAW.dll
0x73b10000 - 0x73b16000 C:\WINDOWS\system32\DCIMAN32.dll
0x77bd0000 - 0x77bd8000 C:\WINDOWS\system32\VERSION.dll
0x6d350000 - 0x6d356000 C:\Program Files\Java\jre6\bin\jawt.dll
0x498a0000 - 0x49add000 C:\WINDOWS\system32\iglicd32.dll
0x495a0000 - 0x495ea000 C:\WINDOWS\system32\igldev32.dll
0x52fe0000 - 0x52ff3000 C:\Documents and Settings\Jean.JEANBIGBOSS-234\Application Data\.minecraft\bin\natives\jinput-dx8.dll
0x6d2d0000 - 0x6d30a000 C:\WINDOWS\system32\DINPUT8.dll
0x53010000 - 0x53019000 C:\WINDOWS\system32\HID.DLL
0x778e0000 - 0x779d8000 C:\WINDOWS\system32\SETUPAPI.DLL
0x76be0000 - 0x76c0e000 C:\WINDOWS\system32\WINTRUST.dll
0x76c40000 - 0x76c68000 C:\WINDOWS\system32\IMAGEHLP.dll
0x53180000 - 0x53192000 C:\Documents and Settings\Jean.JEANBIGBOSS-234\Application Data\.minecraft\bin\natives\jinput-raw.dll
0x532a0000 - 0x533c9000 C:\Documents and Settings\Jean.JEANBIGBOSS-234\Application Data\.minecraft\bin\natives\OpenAL32.dll
0x73e60000 - 0x73ebc000 C:\WINDOWS\system32\dsound.dll
0x72c70000 - 0x72c79000 C:\WINDOWS\system32\wdmaud.drv
0x72c60000 - 0x72c68000 C:\WINDOWS\system32\msacm32.drv
0x77bb0000 - 0x77bc5000 C:\WINDOWS\system32\MSACM32.dll
0x77ba0000 - 0x77ba7000 C:\WINDOWS\system32\midimap.dll
0x73e30000 - 0x73e34000 C:\WINDOWS\system32\KsUser.dll
0x53540000 - 0x535e1000 C:\WINDOWS\system32\dbghelp.dll

VM Arguments:
jvm_args: -Xmx1024m -Dsun.java2d.noddraw=true -Dsun.java2d.d3d=false -Dsun.java2d.opengl=false -Dsun.java2d.pmoffscreen=false
java_command: net.minecraft.LauncherFrame
Launcher Type: SUN_STANDARD

Environment Variables:
PATH=C:\Program Files\PC Connectivity Solution\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
USERNAME=Jean
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 6 Model 14 Stepping 8, GenuineIntel



--------------- S Y S T E M ---------------
M
OS: Windows XP Build 2600 Service Pack 2

CPU:total 1 (1 cores per cpu, 1 threads per core) family 6 model 14 stepping 8, cmov, cx8, fxsr, mmx, sse, sse2, sse3

Memory: 4k page, physical 514428k(27680k free), swap 1331820k(118544k free)

vm_info: Java HotSpot(TM) Client VM (20.1-b02) for windows-x86 JRE (1.6.0_26-b03), built on May 4 2011 00:50:59 by "java_re" with MS VC++ 7.1 (VS2003)

time: Mon Aug 08 14:42:29 2011
elapsed time: 1202 seconds