What Is Spyware?

Spyware is software. And it's not written and distributed to pursue some fancy spy agency agenda, such as finding out the color of Britney's shower curtain. It's mostly written so its authors can find out about you, where you live, what you like to do on your computer, and where you go on the Web. Why do they care? Because they can make money from that information.
Spyware is "uninvited, unwanted, stealthful, invasive, annoying, exploitive, and potentially privacy-compromising PC add-on software whose ongoing presence in millions of PCs worldwide benefits not the computer's owner and operator, but the interests of the publishers of this troubling new class of software.
What Does Spyware Do and Why Is It Bad?
Spyware is considered malware (malicious software) because it installs itself on your computer without your knowledge. Then it watches your computer habits, compromising your privacy.
Spyware is also annoying because it pushes unwanted advertising at you. Pop-up ads appear out of nowhere on your desktop. And because it is spying on you, it pushes ads at you that it thinks you'll click on.
If that's not enough, spyware can clog your system's memory and use space on your hard drive, causing performance slowdowns. It can get so cloggy that it'll make your computer unusable.
Some spyware programs can even capture your keystrokes and send them to a third party. This can potentially expose your user IDs and passwords to thieves.
It can also allow installation of an electronic back door that allows bad people to log into your computer remotely and use it for their own purposes, such as sending spam or launching malicious attacks on other computers on the Internet.
Spyware can change settings and hijack your web browser so a rogue homepage is loaded every time you surf the Web.
On top of all this, some spyware embeds itself so cleverly and deeply into your system that removing it requires a lot of computer expertise. You almost have to be as computer-savvy as a nine-year-old.
About the Author
Alex Kubik is shareware and freeware fan, He tests various software articles ranging from spyware utilities to antivirus tools. Follow the link to get more information about anti spyware tools.