What is spyware?

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Installs and gathers information from a computer without permission, and reports the information to the creator of the software or to one or more third parties. It provides the consumer with little or no control over removing the software. Spyware can change system settings, install keystroke loggers, collect and report consumer's personal information, use computer processing capacity without permission, and deliver spam or ads without consumer's notice and consent.
Spyware often installs as a third-party component bundled with a freeware or shareware application.