Privatefirewall w/Pest Patrol - Version 4.0 Privatefirewall 4.0 is a Personal Firewall that eliminates unauthorized access to your PC. Privatefirewall provides solid protection instantly while allowing advanced users to create custom configurations. Privatefirewall now includes Anti-Spyware from Computer Associates, that detects and removes spyware, adware, and other web- based threats to protect your PC from unauthorized access, information theft and diminished system performance.