the Right hand side, Click on Settings.
window will pop up, Avast Settings.
on Update on the right hand side.
down and expand proxy settings by clicking on it. Direct Connection will be
Specify proxy server, select Type either http or Socks v4.
the IP address and port Number.
the authentication, you can choose no authentication, if username and password
are not provided by the host.
you could choose either Basic authentication (plaintext) or Windows integrated
authentication (NTLM) and enter the user name and password provided.
on Ok and Avast will automatically update using the proxy server