I was using the Free Firewall until last Friday when I got the pop-up that said an upgrade was available. I followed all the steps (uninstalling, downloading, installing) but the install stops at about 20% of configuration with error saying file VADATA.dll is missing...perhaps a reinstall of the application would fix this problem". I have tried a dozen times to install ZA, have cleaned my registry and scanned for problems and viruses, yet still the same error. I run Windows XP Home Edition SP3. Please help....oh yeah, I have no app called "Threat...." on my system that was referred to in an earlier post.