The best firewalls can stop attackers in their ... down is the constant pop-up ads pushing on cross-sell for PC tune-up and other software, something people who have paid for a license should ...

AVG is best known for its excellent free antivirus software ... rivals when your PC is offline. It bundles together Defender, which monitors for viruses and malware; Firewall, which blocks ...

A firewall that is provided by software. It often refers to a personal firewall in a user's computer, but software firewalls may be installed in servers as well. Contrast with hardware firewall.