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Most people on the Internet have heard of spyware, but there still are many who consider it as something that only happens to others. Of course, this is where they are wrong and the effects of this are great. Spyware is known for causing many problems and doing many things including stealing people's identity, causing a computer to function as a spam relay, displaying pop-up ads, and slowing the system so much that it's difficult to use.
There are two types of spyware, one is very harmful and includes Trojans and keyloggers designed to steal information while the other is happy to just redirect users to other content and monitor their Internet activity. While this second type is not stealing personal information, it is still harmful for your computer as it will slow it down. This may not be much for one piece of "adware", but usually it is never just one piece and you will notice a difference.
Surfing habits of users have been seen as a cause of more or less spyware with children's sites giving the most adware and gaming sites containing spyware and adware. Online shopping is the safest and usually doesn't add any malicious software to a system.
More information including how to protect and prevent spyware from stay on your system can be found here.

Labels: adware, internet, safety, spyware, trojan