To do this, you need an active license. You can buy an activation code in our online store. To renew a license with a discount, License Renewal and Upgrade Center.
To upgrade an older version of the application to Kaspersky Internet Security 2017, download a new version from the Kaspersky Lab website and install it without removing the older application. 

If the application database update causes errors, follow the recommendations from the article How to diagnose update problems in Kaspersky Lab products.
The application is updated every two hours and downloads data only for the enabled application components. You can change the update frequency in application settings.