We recommend that you use a trial version Kaspersky Internet Security to familiarize yourself with the application. The trial license allows you to access all the application’s features, but its term is limited to one month. 

To apply the trial license:

1. In the main window, click Enter activation code. To learn how to open the main application window, see this article.
2. Click Activate trial version of the application → Done.

The trial license will be activated for one month. To continue using Kaspersky Anti‑Virus after the trial period, buy a license.

1. In the application window, click License. To learn how to open the main application window, see this article.
2. Click Purchase license. You will be redirected to the Kaspersky website, where you can make your purchase.
3. Select the product, the number of devices and the license term.
4. Select the Auto Renewal checkbox and click Renew my license automatically in order to automatically renew your license when it expires. See this article for more information about auto-renewal. 
5. Choose one of the options:
   • Renew, to continue using Kaspersky Anti-Virus for another licensing period.
   • Buy Now, if you want to switch to Kaspersky Total Security.
6. Enter your personal details, email address and select a payment method. Auto-renewal is only available when paying by card.
7. Accept the Terms of Sale and Privacy Policy.
8. Click Buy Now and follow the instructions in the online store to complete your purchase. 

The activation code will be sent to the email address you specified.

We recommend that you connect your application to My Kaspersky to save your license information in your account. You may need it for renewal or when contacting technical support. To learn how to connect the application to My Kaspersky, see this article.

To activate the application:

1. In the application window, click License. To learn how to open the main application window, see this article.
2. Click Enter activation code. 
3. Enter the code from the message you have received after buying the license and click Activate → Done.

Kaspersky Anti-Virus is now activated.

If you purchased a license for multiple devices, apply the same activation code to the Kaspersky Anti-Virus application on each device.

You can find instructions on how to solve issues in the Activation errors section.

If the issue persists, submit a request to Kaspersky technical support by choosing the topic of your request.