As the name suggests, spyware is a type of malicious software that was initially created primarily to spy on the activity of the unsuspecting victim. With time, however, spyware has advanced considerably, and is now used for purposes that range from using your device to generate traffic for host websites, or even for providing you with consistent sales offers and executing pop-ups that can be an absolute nuisance.
Interestingly enough, there are several different ways in which spyware can make its way into your systems. While spyware generally comes as part of the package with “free” software available on peer-to-peer file sharing platforms through a technique generally known as piggybacking, it is also possible for you to mistakenly download spyware when you are trying to install an add-on for a browser.
In some cases, spyware may also disguise itself as anti-spyware in order to increase its chances of being downloaded by unsuspecting victims.
Since the malicious spyware code is incessantly working in the background, spyware can drain your system of its processing power significantly.