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T

toolbar

Toolbar-A program which adds buttons to your browser, usually grouped together below the address bar or along the bottom of your browser window. Similar to a BHO.

tracking cookies

Tracking Cookie-Internet browsers write and read cookies, files with small amounts of data (such as site passwords and settings) based on instructions from Web sites. In many cases, cookies provide a benefit to users. However, in some instances tracking cookies are used to consolidate and track user behaviour across different sites, which provide marketers with private information about the website's users.

trojan

Trojan-Trojan viruses slip into an individual’s system and run without the user’s knowledge. They can have many malicious functions. For example, some trojans are dialers that use a computer's modem to dial long-distance, generating huge phone bills for the computer owner. Unlike viruses and worms, trojan infections do not make copies of themselves.

They are often used to exploit a user's computer to download other malicious adware and spyware programs, through  a backdoor or a downloader mechanism.