good job on being pro-active, wizzy.
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kitty,
lockdown means it'll block all the
in coming and out going traffic.
The only advantages to that is if you never shut down your computer (that you leave it in sleep mode) and if you were trouble shooting your computer and you don't want to be interfered by additional internet bugs while you're trouble shooting it.
it is the equivalent of unplugging your puter or your modem. But most people don't like to do that. So this program was created for those that want to just "unplug" it via their puter rather than plugging and unplugging
if you turn off your computer. You don't have to worry. If you let your puter fall asleep vs. shutting it off. You might want to just consider unplugging the modem(or just the ethernet wire that is connected to your puter) vs going through this feature.
I am not familiar with McAfee's firewall lockdown feature but I suspect it's the same as others. It might give you more trouble than the virus itself.
good question though.
*note. If you LOCK it down. You won't be able to access the internet (if you are able to, then the lockdown is NOT doing it's job.)