Guideline for Prevention of Spyware and Other Potentially Unwanted Software
Most users are aware of the impact of virus/worm and therefore they have taken measures to protect their computers, e.g. using Anti-Virus program. However, spyware and other potentially unwanted software are commonly overlooked. They are programs which sit quietly on the system and steals information. They are much less visible than virus and worm. So, the actual number of this kind of infection must be much greater than the figures reported.