Minecraft Launcher Crash?

I updated my minecraft to 1.7.9 and now i get a crash at the start of the launcher. Please help! Here is the crash report:
Bootstrap (v5)
Current time is May 12, 2014 4:10:09 PM
System.getProperty('os.name') == 'Windows Vista'
System.getProperty('os.version') == '6.0'
System.getProperty('os.arch') == 'x86'
System.getProperty('java.version') == '1.7.0_55'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '32'

Downloading: https://s3.amazonaws.com/....pack.lzma
Got reply in: 441ms
Downloaded 1002.5kb in 0s at 1185.1kb/s
Renaming C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.pack.lzma.new to C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.pack.lzma
Renamed successfully.
Reversing LZMA on C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.pack
Unpacking C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.pack to C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.jar
Cleaning up C:\Users\Kali!\AppData\Roaming\.minecraft\launcher.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.(LogManage

Guest

What i would do is re download mincraft from the site? But if that does not work, it says that your problem is a log you might have to mess around with your profile.

Alton