I recently installed windows home premium and since then my minecraft launcher won't launch minecraft and it gives me this crash report:
---- Minecraft Crash Report ----
 // Everything's going to plan. No, really, that was supposed to happen.
Time: 24/07/14 10:51 AM
 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 bao.ag(SourceFile:340)
 at bao.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(Displa
