Can't help with avg, but is adaware allowed access through your firewall, as updates are applied the 'engine' can change and the firewall will not allow access to the newly updated software.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
How VR is being used to simulate space
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.