The SPF two-way firewall keeps hackers out and your private info inside.
Edit by : Sunbelt Personal Firewall used to be called the Kerio Personal Firewall (KPF). Kerio was going to discontinue it, but Sunbelt acquired it from Kerio to save the product from going under.
We needed a new name, belt Friction and changed KPF into the new SPF !

Whats New In The Latest Version?
The biggest addition is support for Vista 32 bit (with 64 bit native support on the roadmap). However, theres been a lot of under-the-hood improvements in many areas. These include:
Significant improvement in network performance
Significant improvement in packet filtering
Enhanced Process Injection prevents code injection attempts into Windows
Numerous stability issues corrected in the firewall service
Significant improvement in overall product stability
Updated Intrusion Detection rules
Updated translation files for multiple languages

You know that you need a firewall, but firewalls need to give you 2-way Protection: incoming and outgoing...

The built-in firewall in Windows is worse than useless, since it is only one-way
The SPF two-way firewall keeps hackers out and your private info inside you can free download Sunbelt Personal Firewall 4.6.1861 now.