: This error occurs when the key is intended for a different Kaspersky product or an older version of the software. For example, a Kaspersky Anti-Virus key won't work for Kaspersky Internet Security, and a key for the 2021 version may not work on the 2025 version. The solution is to ensure you have downloaded the latest version of the correct product from the official website or to obtain the correct key for your specific version.
When your trial period ends, the software will change its behavior:
Blocked keys prevent the antivirus from downloading critical daily database updates, leaving you vulnerable to new threats. How to Properly Activate Your Kaspersky Trial kaspersky 90 days trial key
Explaining how to a trial subscription to avoid charges.
If you require protection beyond 30 days without immediate payment, consider these options: “Key is blocked” error - Kaspersky Support : This error occurs when the key is
If you visit the official Kaspersky rescue disk or beta sections, you sometimes find 90-day keys for legacy products. As of 2025, the most reliable method is:
Sometimes, when purchasing new hardware or software, a 90-day trial might be included. When your trial period ends, the software will
Once your trial period ends, the premium features will be disabled. To continue enjoying full protection and the latest updates, you must transition to a paid license. You can do this directly from within the application. Here's how: