Adware is usually bundled with a commercial software. It can install itself on your computer either with your permission or without your knowledge when you install the software package. Milder forms of adware are also present in the form of pop-up or pop-under banners that pop up when you visit certain websites. These ads, sometimes referred to as "java traps", open up in several mini-windows, each time a window is closed by the user, code that spawns another window is activated.
Programmers sometimes add adware to their software packages in order to recover some of the cost of developing the package. If the package is freeware, then the adware is used to make up for the entire cost of development. Shareware packages also sometimes carry adware that is activated once the trial period is over.
Adware can have several negative effects on your computer. It generally slows it down since it gobbles up some of your system's RAM. It also, to a large extent, slows down your internet connection, as a lot of bandwidth can be used to download ad contents.
Adware is generally licensed content, and therefore usually requires the user's permission before being installed on user's computer. Adware collects information about how you are using your computer and the content transmitted therein, and based on this, displays "relevant" ads in your browser. The free version of certain browsers, like Opera (not in the present version), used to support adware. Come P2P clients, such as KaZaA, have adware that install on your computer.
Mind it, there are very few examples of such "good" adware, that installs on your permission! Good adware allows you to uninstall it whenever you like it. The other type of adware installs itself on your computer without your permission. Usually, sites with explicit content install such packages onto your computer. These could eventually "hijack" your browser, causing your screen to get filled with more and more pop-ups.
Programmers sometimes add adware to their software packages in order to recover some of the cost of developing the package. If the package is freeware, then the adware is used to make up for the entire cost of development. Shareware packages also sometimes carry adware that is activated once the trial period is over.
Adware can have several negative effects on your computer. It generally slows it down since it gobbles up some of your system's RAM. It also, to a large extent, slows down your internet connection, as a lot of bandwidth can be used to download ad contents.
Adware is generally licensed content, and therefore usually requires the user's permission before being installed on user's computer. Adware collects information about how you are using your computer and the content transmitted therein, and based on this, displays "relevant" ads in your browser. The free version of certain browsers, like Opera (not in the present version), used to support adware. Come P2P clients, such as KaZaA, have adware that install on your computer.
Mind it, there are very few examples of such "good" adware, that installs on your permission! Good adware allows you to uninstall it whenever you like it. The other type of adware installs itself on your computer without your permission. Usually, sites with explicit content install such packages onto your computer. These could eventually "hijack" your browser, causing your screen to get filled with more and more pop-ups.
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