Anti-spyware technology is used in detecting and blocking spyware attempts. Spyware is a type of software that allows advertisers or online criminals to discover personal data from a computer, without the user’s permission. Spyware can infect your computer if you visit certain websites, with pop-up messages that ask you to download an application or program. If such software gets on your computer, it will attempt to track down your online activity and send that information to third parties. Usually, spyware is detected when it starts using system resources, finally affecting the overall stability.