: While physical copies of the 2015 version were sold with multi-year validity (e.g., until 2019), it is highly recommended to use the latest version to ensure compatibility with modern operating systems and current threat definitions. Installation and Modern Alternatives
: If you have an existing subscription, you can find your activation code by navigating to Menu > My Subscriptions within the Avast interface. licence-complete-avast-internet-security-2015
: Licenses can be activated by entering the code from your confirmation email or by signing in to your Avast Account within the application. : While physical copies of the 2015 version