Minecraft error: How do I fix it?

I keep getting this Minecraft error and was wondering if anyone knew how to fix it:

Minecraft has crashed!
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Minecraft has stopped running because it encountered a problem; Failed to start game This error has been saved to C:UsersdanAppDataRoaming.minecraftcrash-reportscrash-2012-09-03_19.03.10-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT 1596ac6b -------- Generated 03/09/12 19:03

• Minecraft Version: 1.3.2
• Operating System: Windows 7 (x86) version 6.1
• Java Version: 1.7.0_05, Oracle Corporation
• Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
• Memory: 434211704 bytes (414 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
• JVM Flags: 2 total; -Xms512m -Xmx1024m
• LWJGL: 2.4.2
• OpenGL: ~ERROR~ NullPointerException: null
• Is Modded: Probably not
• Type: Client
• Texture Pack: ~ERROR~ NullPointerException: null
• Profiler Position: N/A (disabled)[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(WindowsContextImplementation.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:233) at net.minecraft.client.Minecraft.run(SourceFile:516) at java.lang.Thread.run(Unknown Source) --- END ERROR REPORT f148ee9d ----------

I am running Windows 7.