Few days before only I have recovered my system from the virus attack while using facebook. I have installed kaspersky antivirus program with the latest update. I want to know there is still the possibility of virus attack when using internet. Some of them suggested me to install a firewall for my system as it guards our system from the intruder entering into our system. I am not aware of the freeware firewalls which are available. Also provide necessary steps to install and configure them.
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