From some months I don’t receive virus definitions upgrade. my OS is Windows 7 professional and Avast 7.0.1407. what can I do? Help!
Have you tried repairing avast via remove programs and a reboot, if that doesn’t help then i suggest downloading the latest version 7.0.1466 from here http://forum.avast.com/index.php?topic=103687.msg830212#msg830212 and save then uninstall your current version reboot and install the saved copy.