6

To update manually, you have to right-click the avast! blue ball icon in your system tray, and choose Updating - > either iAVS Update for updating virus definitions only, or Program Update to update avast! program if new version is available on the server.

EDIT: And do not change those options to MANUAL inside the avast! program settings. They need to stay on Automatic like before. In case you keep them on MANUAL and you forget sometimes to update, you’ll be without the latest virus definition or even program version… avast! can’t protect your computer if its virus definitions are not up to date.