Why should I be concerned about spyware or adware?

Passwords, credit card details and other personal information could end up in wrong hands.

Your computer could get unwanted viruses, worms or even Trojan.

You would receive unwanted emails.

Your computer could be used by malicious operators to do damage not only your own computer, but to other computer users too.

How did I get spyware on my computer and how do I eliminate it?

It usually happens when you visit a web site, and are prompted to download something that is said to be "necessary" to view or use features of that web site. Also, you might want or download a program that has some nice features, but also installs program code that can send information out without your knowledge.

"By tracking and publicizing growth of spyware, we can better educate consumers of its risks and encourage them to take steps to protect themselves and their families while online," said Christine Stevenson of Webroot, which conducted scans.

People concerned about what might be lurking on their machine can download software such as popular ZoneAlarm Pro, Pest Patrol, and Spybot to disinfect their computer.

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