Do firewalls stop viruses, Trojans, adware, and spyware?
No, in general, firewalls do not stop viruses, Trojans, adware, or spyware. Firewalls, usually, only protect your network from inbound traffic from an outside (Internet) network. You still need anti-virus software, anti-adware and anti-spyware software applications to protect your system when it does go out on the Internet.




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