Minecraft: Java no me deja iniciar minecraft en windows xp

Hola chicos! Disculpen pero es que bueno, soy nueva en esto, y acabo de intentar descargar minecraft. Lo hago con el link que proviene de minecraft.net, pero cuando le doy click al icono, me sale esto:
Bootstrap (v5)
Current time is Jul 2, 2014 2:58:44 PM
System.getProperty('os.name') == 'Windows XP'
System.getProperty('os.version') == '5.1'
System.getProperty('os.arch') == 'x86'
System.getProperty('java.version') == '1.7.0_60'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '32'

Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 547ms
No update found.
Reversing LZMA on C:Documents and SettingsVale!Datos de programa.minecraftlauncher.pack.lzma to C:Documents and SettingsVale!Datos de programa.minecraftlauncher.pack
Unpacking C:Documents and SettingsVale!Datos de programa.minecraftlauncher.pack to C:Documents and SettingsVale!Datos de programa.minecraftlauncher.jar
Cleaning up C:Documents and SettingsVale!Datos de programa.minecraftlauncher.pack
Starting launcher.
FATAL ERROR: java.lang.ExceptionInInitializerError
	at org.apache.logging.log4j.util.PropertiesUtil.(PropertiesUtil.java:71)
	at org.apache.logging.log4j.util.PropertiesUtil.(PropertiesUtil.java:31)
	at org.apache.logging.log4j.status.StatusLogger.(StatusLogger.java:48)
	at org.apache.logging.log4j.LogManager.(LogManager.java:44)
	at net.minecraft.launcher.Launcher.(Launcher.java:47)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at net.minecraft.bootstrap.Bootstrap.startLauncher(Bootstrap.java:240)
	at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:124)
	at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)
Caused by: java.lang.NullPointerException
	at org.apache.logging.log4j.util.ProviderUtil.(ProviderUtil.java:70)
	... 12 more


Please fix the error and restart.





Y no tengo ni la más minima idea de a qué se debe ): Por favor! AYUDA!