Hello Bob,
We always recommended you to use our AVG's Firewall.
AVG Internet security program has Enhanced Firewall in it that can protect your PC from hackers.
Please feel free to contact us should you need any assistance.
is it best to use win10 firewall or avg firewall
Bob, AVG firewall is only available with AVG Internet Security, AVG Protection PRO & AVG Ultimate.
AVG Guru