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Internet is useful, but it is also very dangerous. There are many websites with illegal content (pornography, violence etc). What is more internet can be dangerous for computers without anti virus protection and Web filtering . You should know that many viruses, e-mails and files, which are downloaded from the internet contain viruses, which can destroy our computers (hard drive) and data, spyware that can help cheaters to steal our personal information and adware, which are installing and showing unwanted ads (spam).

Fortunately Url filtering process can protect our computers and our data from such types of danger. This procedure is being performed by special programs. In most cases they are a part of big anti virus packages.

Good Web filter should protect our computer from viruses, spam, spyware and adware applications. It should block suspicious internet content. It also has to control our communicators (skype etc).

We can buy good filtering applications in computer shops. They are not very expensive. We are also allowed to buy these programs in the internet. It is possible thanks to the internet banking and credit cards. Some programs are available for free on some websites. We just need to look for them with patience.