ALERT XP USERS: You can continue to update Java, but you’re on your own if you have issues…
Java 7 is no longer supported on XP, although the website points out that “Users may still continue to use Java 7 updates on Windows XP at their own risk, but support will only be provided against Microsoft Windows releases Windows Vista or later”. My strong recommendation is to uninstall the application.
Cite: http://java.com/en/download/help/sysreq.xml