So.... update now or be destroyed!
If you are running 64-bit Windows, you should use the 64-bit Java too. Get Java here: http://www.java.com/en/download/manual.jsp
And as always, if you have Java enabled in your browser then disable it. You really don't want to run Java applets in your browser in most cases. It's a huge risk having Java enabled in your browser. If you don't know how to disable Java in your browser, here is how.
*update*
Added manual download page so you can choose the 64-bit version.
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