EMET is a toolkit provided by Microsoft to configure security controls on Windows systems making it more difficult for attackers to successfully launch exploits. EMET doesn't take the place of antivirus or patch management, but it does provide an important set of safeguards against not only existing exploits, but also against future 0-day exploits which have yet to be developed or released. Even the best signature-based antivirus programs don't do a good job at protecting from 0-days.
EMET...
