|But what type of Java are you trying to update - the RE or the JDK? The JDK includes the RE.|
Make sure you read this article for 64-bit Windows operating systems.
If you have previous versions of Java installed, it's best to completely uninstall all instances including a possible JavaDB before installing new versions. Sometimes old instances of Java remain when new ones get installed and it ends up causing problems. It was a bigger problem before Oracle bought Sun Microsystems, but the problem isn't completely gone.
Apologies if I don't respond to your reply immediately. I don't check this site daily, but you're welcome to PM me as a reminder.