Adware

It is also called advertising supported software, which make money for their owners. This is done by automatically creating online advertising in the user interface. Generally there are two types of revenue that are generated by these software : pay per click and other is for display of advertisement. There are two ways Adware can get in to the computer

a) Freeware or shareware.

Adware can be added into some freeware or shareware program which users download for free from Internet.

b) Infected Websites.

Opening or visiting an infected website can result in unauthorized installation of Adware on your computer. Hacking technologies are often used to infect the user computer via software weakness in the browser.