|The problem with the freebies is you have to update them|
Having used several free antivirus programs as well as several pay-for-play types over the last 15+ years I can tell you one thing both types have in common is that you must always keep updating the virus database on them.
If you didn't update, how would your AV software "learn" how to find the new viruses written since you installed it?
Simply put, there is no such thing as an AV program that doesn't require updating.
If your friend works somewhere where they have highspeed he could look for a solution that has downloadable "network updates" for the AV software that he could then put on a USB memory key and take home and apply. I'm not sure anybody really does those anymore but you never know. I know several of the AV programs that you have to pay for used to do that for businesses. But it's not something I'd expect to see in the free stuff.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.