I don't know what you've been testing, but NAV has been a Godsend. After being less than satisfied with McAfee, I tested out both Norton and Trend Micro. Norton Corporate works the best. With great server side console, easy unattended installs, and easy to distrubute client disks, I couldn't go wrong. Has picked up every virus coming in to the place, adn found some that McAfee had missed. Plus LiveUpdate is the easiest way to update, and the downloads are small -- perfect for my clients here. And I have no idea what you are talking about -- NAV Corporate has heuristic scanning.

I did look into etrust (formerly InnoculanIT) and found very little customer support. And as much success as I had using the former product at my last employers, I couldn't bear to bring it in here.

However, all this good from my verson my be simply because it is Corporate Edition, as the executables differ from those that anti-av viruses shutdown.

So Norton isn't all bad. It certainly fits my needs very well -- and with many ignorant users in my network, it's worked like a dream.