Manage these settings at:
Settings → Update
It is very important to regularly update both the program and the virus definitions to be sure you are protected from the latest threats.
View information about your current virus definitions. Click Update to update now.
Expand Settings to configure Avast to update virus definitions automatically (default), manually, or notify you when a new version is available.
View which program version you are currently using. Click Update to update now.
Expand Settings to configure Avast to update program version automatically, manually, to download updates and notify you when ready to install, or notify you when an update is available.
Under Details you can select your Internet connection method to optimize updates and make the process more reliable.
You can also set how often Avast checks for available updates.
Auto-update interval refers to how often Avast checks for available updates.
If you connect directly to the Internet you can ignore this section.
If you connect to the Internet through a proxy server and you know the proxy server details, select Specify proxy server and enter the proxy details: