I'll seccond symantec corporate edition. Unfortunatly we recently migrated to Symantec Client Security, which is the antivirus bundled with a crappy firewall. When the firewall fails to install(one out of fifty user machines, I'd estimate), it's taking your network connection with it, and it's probably never going to work if you reinstall it. Us IT people all keep the standalone av installer around for our own *ahem* personal use.
I don't know why home user focus groups always insist on bubbly non-standard interfaces. Both Macafee and Norton seem to use them, and they're always impossible to figure out how to do whatever simple tast you're trying to get them to do. (And, for the reccord, I don't care what my "security index" on a scale of one to ten is)
Matthew