Spy ware is a software program that watches what a user does on his computer. This program sends the information it has gathered on the users activities to a hacker over the internet. The information of the websites a user visits is collected and sent to advertisement agencies. More malicious spy ware can record all the keys that have been typed by the user. This method is used to gain passwords and credit card numbers of the user. Advertisement goals are furthered by Pop-Up advertisement and routing of HTTP requests to advertising sites.

The user is a victim of social engineering. He/she is deceived by an explanation of some problem or vulnerability with their computer system. What follows is the user accepting the software to correct this vulnerability. In reality the user installs the spy ware.

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