Network Printing no longer works under AVAST 2015

Hi,

I rebooted my computer a couple of days ago and I can no longer print to the HP network printer. Turning the firewall off permits printing. I am using Win7-64bit. I tried adding range of IP addresses including printer to friends. Firewas set to private. Settings are very confusing and nothing was changed on my system over than an update to AVAST. Is there an easy fix?

Thanks