Probleme minecraft aidez moi svp

Bonjour, j'ai mon nouvo pc et je peut jkouer a minecraft depui mais aujourdhui j'ai u cette erreur la voici :
Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Rendering screen

A full error report has been saved to C:\Users\vincent\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-28_21.49.54-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash :(



--- BEGIN ERROR REPORT f90b8f66 --------
Full report at:
C:\Users\vincent\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-28_21.49.54-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 28/12/12 21:49

-- Head --
Stacktrace:
at bey.b(SourceFile:236)
at bey.c(SourceFile:323)
at bey.a(SourceFile:357)

-- Screen render details --
Details:
Screen name: bey
Mouse location: Scaled: (261, 31). Absolute: (522, 416)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
at ban.b(SourceFile:774)
at net.minecraft.client.Minecraft.J(SourceFile:605)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 433450872 bytes (413 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: AMD 760G GL version 3.2.9606 Compatibility Profile Context, ATI Technologies Inc.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

java.lang.NoClassDefFoundError: org/lwjgl/util/glu/GLU
at bey.b(SourceFile:236)
at bey.c(SourceFile:323)
at bey.a(SourceFile:357)
at ban.b(SourceFile:774)
at net.minecraft.client.Minecraft.J(SourceFile:605)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.util.glu.GLU
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
--- END ERROR REPORT 59451eb ----------