bonjour 
reçamment j'ai change de pc et j'ai ce msg d'erreur:
---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.
Time: 18/03/14 16:31
Description: Initializing game
org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelForma
t(Native
Method)
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat
(WindowsPeerInfo.java:52)
at org.lwjgl.opengl.WindowsDisplay.createWindow(Windo
wsDisplay.java:252)
at org.lwjgl.opengl.Display.createWindow(Display.java
:306)
at org.lwjgl.opengl.Display.create(Display.java:848)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at bfr.ae(SourceFile:354)
at bfr.f(SourceFile:740)
at net.minecraft.client.main.Main.main(SourceFile:121
)
A detailed walkthrough of the error, its code path and all known details is as follows:
--------------------------------------------------
-------------------------------------
-- Head --
Stacktrace:
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelForma
t(Native
Method)
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat
(WindowsPeerInfo.java:52)
at org.lwjgl.opengl.WindowsDisplay.createWindow(Windo
wsDisplay.java:252)
at org.lwjgl.opengl.Display.createWindow(Display.java
:306)
at org.lwjgl.opengl.Display.create(Display.java:848)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at bfr.ae(SourceFile:354)
-- Initialization --
Details:
Stacktrace:
at bfr.f(SourceFile:740)
at net.minecraft.client.main.Main.main(SourceFile:121
)
-- System Details --
Details:
Minecraft Version: 14w11b
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 20582776 bytes (19 MB) / 52056064 bytes (49 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerfor
mance_javaw.exe_minecraft.exe.heapdump
-Xmx512M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w11b
LWJGL: 2.9.1
OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
GL Caps:
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
Anisotropic Filtering: Off (1)
quel est le probleme,et qu'es ce que je fais pour l'enlever
