Thanks for reply.
I have installed with STS.exe(171 MB for win32) successfully but .zip has some issue.
I think there is some issue related to files available in zip folder.
(Sun Certified Java Programmer)
(Sun Certified Web-Component Developer)
when installed STS on Windows you need to watch for the bit level of your OS and JDK. So if your JDK is 64bit then install STS 64bit; if your JDK is 32bit (even on 64bit Win) install STS 32bit.