Mért nem indul el a Minecraft?

Pontosan ezt:

Minecraft has crashed!

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Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to support@mojang.com.

Please include a description of what you did when the error occured.

--- BEGIN ERROR REPORT a1dce528 ------

Generated 2012.05.12. 20:00

Minecraft: Minecraft 1.2.5

OS: Windows XP (x86) version 5.1

Java: 1.7.0_04, Oracle Corporation

VM: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation

LWJGL: 2.4.2

[failed to get system properties (java.lang.NullPointerException)]

org.lwjgl.LWJGLException: Could not create context

at org.lwjgl.opengl.WindowsContextImplementation.nCreate(Native Method)

at org.lwjgl.opengl.WindowsContextImplementation.create(Windows

ContextImplementation.java:50)

at org.lwjgl.opengl.Context.<init>(Context.java:120)

at org.lwjgl.opengl.Display.create(Display.java:858)

at org.lwjgl.opengl.Display.create(Display.java:784)

at org.lwjgl.opengl.Display.create(Display.java:765)

at net.minecraft.client.Minecraft.a(SourceFile:294)

at net.minecraft.client.Minecraft.run(SourceFile:716)

at java.lang.Thread.run(Unknown Source)

--- END ERROR REPORT c5d67b54 ------