All malware is inherently dangerous, but there are a few threats that stand out amongst the others when it comes to inflicting damage. We took a look at some of the most destructive malware of all time from traditional viruses, worms and Trojans to increasingly prevalent PUAs such as adware and spyware. This list, while covering most of the all-time worst threats, is not all- inclusive. For example, notable threats are not on this list such as the ILOVEYOU bug, although they also rank as highly destructive. How many of these threats do you remember?