Spyware are programs, cookies, or registry entries that track your activity and send that data off to someone who collects this data for their own purposes. Usually, those people are marketing companies trying to collect information to help them sell better.

Spyware is usually installed quietly, or even secretly, when you install shareware applications.

Many people feel that spyware is a violation of their privacy.

Excessive spyware programs can slow down your Internet connection by filling the line with their traffic. They can also slow down your computer by using up available RAM and CPU cycles.