TZ Personal Firewall - Version 3.3.0.0 TZ personal firewall stops Hackers, Trojans, Spyware, Viruses, DoS attacks & data thieves. Put a secure barrier between your hard drive & hackers, whether you use a dial -up, ISDN, DSL & cable connection. Includes four inter locking security services: a firewall, an Application Control, an Internet Lock, & Zones. Allows you to Lock your PC ,so no connection will be allowed. Monitor all incomming & outgoing activity