Spyware and Adware is advertising supported software that allows its publishers to snoop on a computer user's internet activity.
It is designed to obtain information about computer users and their surfing behavior usually without their knowledge or consent. Spyware is potentially more harmful than Adware because it can record your keystrokes, history, passwords, credit card number and other confidential and private information. Besides spyware and Adware, computers can also be infected with my other internet parasites such as Win fixer 2005, viruses, Trojans, dialers, etc.
Spyware and Adware are installed quite easily on most computers. Many spyware programs often enter computers hidden in programs such as freeware, shareware or demos. Some programs like Win fixer 2005 will often load on boot up, take up your computer memory, cause a computer to display system errors, spawn multiple pop-up windows and even shut down itself.