I too am having problems updating the program/virus definition after I upgraded from 4.8 free edition. The firewall is correctly setup, tried uninstalling it in Safe mode, reboot, new installation but same error. Have also used the uninstall apps mentioned in this forum (aswclear5.exe) but still didn't help.
Im running out of options and patience, what good is the new GUI if the virus def cannot update. My system runs on W7 64bit, Avast version 5.0.507.
Anyone solved this issue?
Thx y'all.