Sun Java has become a popular attack target for hackers and criminals as it can be found on almost every PC.
Sun have responded by regularly releasing new versions that patch newly discovered vulnerabilities.
Unfortunately when you install a new version of Java the old one is not deleted. Sun does this just in case some old applications won't work with the latest Java version. In my experience, this is a rarity.
JavaRa is a free utility that will permanently remove all old and vulnerable versions of Java from your PC. Usage couldn't be simpler: just download it and run it.
Afterward, double check that all versions are gone by running a free online scan with Secunia Software Inspector. This will not only check for old versions of Java but old and vulnerable versions of many other programs as well.
Thanks to regular contributor Lex Davidson for suggesting this item.