Exploits, which have become one of the most common vehicles for malware in the past decade, need out-of-date software in order to accomplish their goal of getting through security holes. But that software, Sullivan says, will be harder and harder to find. For example, with HTML 5's capability to "do it all", the need for third party browser plugins has mostly been eliminated. And today's browsers themselves are auto-updated, without the need for the user to intervene, so users always have the latest version.