Minecraft Forums

when I try to open the launcher I get this error

Bootstrap (v5)
Current time is Dec 21, 2014 12:33:30 PM
System.getProperty('os.name') == 'Windows 8.1'
System.getProperty('os.version') == '6.3'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.8.0_25'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'

Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 719ms
Reversing LZMA on C:\Users\gabriel\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\gabriel\AppData\Roaming\.minecraft\launcher.pack
No update found.
FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: java.io.FileNotFoundException: C:\Users\gabriel\AppData\Roaming\.minecraft\launcher.pack (The file or directory is corrupted and unreadable)
at net.minecraft.bootstrap.Bootstrap.unpack(Bootstrap.java:146)
at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:123)
at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)


Please fix the error and restart.

I REALLY NEED SOME HELP I CANT EVEN PLAY MINECRAFT