A fatal error on installing Matlab 2012b.

I run it on an X64 Win 7 OS with all matlab installing files extracted in one root directory of my computer. Every time I click the setup.exe, it always shows:

1. # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000076f9f4c5, pid=1476, tid=3636 # # JRE version: 6.0_17-b04 # Java VM: Java HotSpot™ 64-Bit Server VM (14.3-b01 mixed mode windows-amd64 ) # Problematic frame: # C [ntdll.dll+0x4f4c5] # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp #

......

I tried making an ISO virtual image to install. Then it shows "Jave_launcher.dll is missing".

I tried reinstalling the latest X86_32 Java environment again and again, adjusting the java_matlab environment variables, and so on. The errors are still there. Any help? Thanks.