Lavasoft Personal Firewall 2.0.

It is more important than ever before to have a first-rate firewall in addition to anti-spyware and anti-virus software. Lavasoft Personal Firewall 2.0 provides the critical protection you need to keep your PC safe from unauthorized access. It is the ultimate security shield against hackers, keyloggers, Trojans and other illicit attempts to access data on your PC, while remaining simple, and easy to use.

Powerful proactive protection with multi-layered security
All known methods for stealing your personal information are blocked
Firewall cannot be deactivated by targeted attacks
Easy to use without sacrificing security or control
Your computer is invisible to unauthorized outsiders, so that you can surf the web privately
You are in control of inbound and outbound Internet traffic
The Entertainment Mode allows you to enjoy movies or games online, without getting interrupted by firewall prompts, while still maintaining maximum security
Use the adaptive firewall rules to suit your personal needs