My copy of Norton can be set to check compressed files swh, and has successfully found a couple of viruses in such compressed files.
On the subject of Outlook, I used to be a Netscape fan so I never used it; I always used other e-mail programmes and even Web-mail services such as Rocketmail and Hotmail. Since I've been virtually forced into using Internet Explorer I still didn't use Outlook until recently, when I got a Pocket PC. The Pocket PC software uses Outlook to synchronize the contacts list in the iPAQ with my notebook. Is Outlook safe these days or is it still the leaky pile of code of legend, just like Messenger?