Click on the link (usually located in the bottom-right corner). Click Activate the application . Choose the option "Activate using key file".

Migrate from version 10 to a modern tier, such as or Kaspersky Next . Current versions offer: Behavioral detection and exploit prevention. Integrated Endpoint Detection and Response (EDR) features.

A key file is a specific file type (typically with a .key extension) used to activate Kaspersky business solutions without needing a direct internet connection to the activation servers.

If your company still relies on , take these steps to ensure protection:

If a key has been blacklisted, it will not activate. Maintaining Security for Legacy Systems in 2026

Operating a legacy endpoint application that has passed its official support lifecycle poses major operational hazards: