Не заходит в minecraft

у меня не заходит в майнкрафт я играю с лицензией
пишет:

----Minecraft Crash Report ----

// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 29.05.14 19:15

Description: Initializing game

org.lwjgl.LWJGLException: Pixel format not accelerated

at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)

at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)

at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.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 ban.ag(SourceFile:340)

at ban.f(SourceFile:713)

at net.minecraft.client.main.Main.main(SourceFile:148)

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

-- Head --

Stacktrace:

at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method)

at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52)

at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.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 ban.ag(SourceFile:340)

-- Initialization --

Details:

Stacktrace:

at ban.f(SourceFile:713)

at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --

Details:

Minecraft Version: 1.7.9

Operating System: Windows 7 (x86) version 6.1

Java Version: 1.7.0_60, Oracle Corporation

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

Memory: 3615648 bytes (3 MB) / 26808320 bytes (25 MB) up to 518979584 bytes (494 MB)

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

Launched Version: 1.7.9

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)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Anisotropic Filtering: Off (1)