I've just formatted my drive c.. now I'm about to install java..

Installing.. when it comes down to copying new files.. then there's an error but I forgot that error.. please help..

OK, what is the error?

Go to this site and click Verify on right hand side, it will check what version you may have now and you should be able to update - post any errors if they come up

Check Java Update
Download Java software from Sun Microsystems (http://www.java.com/en/download/manual.jsp)