launcher bug

when I open the minecraft launcher, it appears

Bootstrap (v5)
Current time is Aug 4, 2013 11:04:28 AM
System.getProperty ('os.name') == 'Windows 7'
System.getProperty ('os.version') == '6 .1 '
System.getProperty ('os.arch') == 'x86'
System.getProperty ("java.version ') == '1 .7.0 _25'
System.getProperty ('java.vendor') == 'Oracle Corporation'
System.getProperty ('sun.arch.data.model') == '32 '

Looking for update
Did not find an update in time.
Reversing LZMA on C: \ Users \ Jose \ AppData \ Roaming \. Minecraft \ launcher.pack.lzma to C: \ Users \ Jose \ AppData \ Roaming \. Minecraft \ launcher.pack
Unpacking C: \ Users \ Jose \ AppData \ Roaming \. Minecraft \ launcher.pack to C: \ Users \ Jose \ AppData \ Roaming \. Minecraft \ launcher.jar
Cleaning up C: \ Users \ Jose \ AppData \ Roaming \. Minecraft \ launcher.pack
Starting launcher.
FATAL ERROR: java.lang.NoClassDefFoundError: sun/security/x509/X509CertImpl
at sun.security.provider.X509Factory.engineGenerateCertificate (Unknown Source)
at java.security.cert.CertificateFactory.generateCertificate (Unknown Source)
at sun.security.pkcs.PKCS7.parseSignedData (Unknown Source)
at sun.security.pkcs.PKCS7.parse (Unknown Source)
at sun.security.pkcs.PKCS7.parse (Unknown Source)
at sun.security.pkcs.PKCS7. <init> (Unknown Source)
at sun.security.util.SignatureFileVerifier. <init> (Unknown Source)
at java.util.jar.JarVerifier.processEntry (Unknown Source)
at java.util.jar.JarVerifier.update (Unknown Source)
at java.util.jar.JarFile.initializeVerifier (Unknown Source)
at java.util.jar.JarFile.getInputStream (Unknown Source)
sun.misc.URLClassPath at $ JarLoader $ 2.getInputStream (Unknown Source)
at sun.misc.Resource.cachedInputStream (Unknown Source)
at sun.misc.Resource.getByteBuffer (Unknown Source)
at java.net.URLClassLoader.defineClass (Unknown Source)
at java.net.URLClassLoader.access $ 100 (Unknown Source)
at java.net.URLClassLoader $ 1.run (Unknown Source)
at java.net.URLClassLoader $ 1.run (Unknown Source)
at java.security.AccessController.doPrivileged (Native Method)
at java.net.URLClassLoader.findClass (Unknown Source)
at java.lang.ClassLoader.loadClass (Unknown Source)
at java.lang.ClassLoader.loadClass (Unknown Source)
at net.minecraft.bootstrap.Bootstrap.startLauncher (Bootstrap.java: 238)
at net.minecraft.bootstrap.Bootstrap.execute (Bootstrap.java: 124)
at net.minecraft.bootstrap.Bootstrap.main (Bootstrap.java: 381)

Please fix the error and restart.