Kaspersky Internet Security 2015

To activate a commercial version of the application, do the following:

1. Make sure the system date is set correctly on your computer.
2. Run the Kaspersky Internet Security 2015 installation.
3. In the Activation window, enter the activation code you received during your purchase. Note that the code contains Latin letters only.
4. Click the Activate button.

4. The activation wizard will connect to Kaspersky Lab server and download the license key. Click the Finish button.

To activate the application from the application's main window, do the following:

1. Make sure the system date is set correctly on your computer.
2. Open Kaspersky Internet Security 2015.
3. In the lower-right part of the window, click the link Enter activation code.

4. In the Activation window, enter the activation code you received during your purchase. Note that the code contains Latin letters only.
5. Click the Activate button.

6. The activation wizard will connect to Kaspersky Lab server and download the license key. Click the Finish button.

Each copy of a multiple-device license for Kaspersky Internet Security 2015 (for example, a 3 PCs license) is installed and activated in the same way on all computers you want to protect. 

To activate Kaspersky Internet Security 2015 on all computers, use one and the same activation code you purchased.

Make sure if the code has been entered correctly or re-enter it.

If the error persists, submit a request to Kaspersky Lab Technical Support via My Kaspersky. Please provide a detailed description of the problem. For more information on how to use My Kaspersky, see the respective FAQ page.