Problems with minecraft, it says Pixel Format Not Accelerated

hi, im having a problem, i like to play minecraft and i recently got windows 8.1, 8.1 RUINED IT! now when i open minecraft and load it it says 'Pixel Format Not Accelerated, i think it has something to do with the drivers sooo here, ATI Radeon 4200    with a   HP Pavillion P6720F Desktop PC,   if u can fix this ill be flying through rainbows

heres a crash report from minecraft...

---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

Time: 3/23/14 8:55 PM

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 azl.ad(SourceFile:325)

at azl.f(SourceFile:696)

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 azl.ad(SourceFile:325)

-- Initialization --

Details:

Stacktrace:

at azl.f(SourceFile:696)

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

-- System Details --

Details:

Minecraft Version: 1.7.5

Operating System: Windows 8.1 (amd64) version 6.3

Java Version: 1.8.0, Oracle Corporation

Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 89617536 bytes (85 MB) / 115867648 bytes (110 MB) up to 954728448 bytes (910 MB)

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G

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: 1.7.5

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)