Defense+ as a standalone module.
You will be able to install just Defense+ (and the sandbox) without having to install the antivirus or firewall, or choosing not to install it on the Internet Security setup.
Out of curiosity in what situation would you not want the firewall with Defense+. It seems to me that they are, and should be, a package deal.
If I may be of some help, it could either be (like some users) that other firewalls work better in their system than your firewall/AV and would prefer to install another firewall/AV other than yours but would love to keep the Defense + module and (of course,) the Sandbox as well since these do a great job protecting the PC or - as it is in my case - it is because that the PC their using is darn too slow to keep up with a lot of software running. I for one loved your Defense + and firewall. However, with a 7 year old computer and OS armed with only as much as 220 MB of RAM, it is really hard to keep up. Thus, we opt to choose the Defense + rather than the firewall or AV. I managed to tame the firewall to make it more…“friendly” with my PC, but it took two weeks before I could make it run smoothly. The antivirus required me to update it manually instead to avoid clogging the internet connection and consuming too much memory (it consumes more than 75 MB at least 50 when idle of RAM and 99 Memory usage during scans only and I have absolutely no idea why even after 7 successful installations) and scans cripples my computer so I had to disable even real-time protection. For this reason, it is definitely a blessing to have Defense + and sandbox as a standalone which protects without having to update and responds faster than the AV. It’s like Threatfire with a lot more control and added protection (Sandbox).
Thus, I vote for having Defense + as a standalone.
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+2