If your trial license has expired, in the main Kaspersky Internet Security  window a message will appear in the main program window informing that “Computer security is at risk. License: expired”.

If notifications about license validity are enabled, then you will also see the following pop-up windows in the bottom right hand part of the screen:

• notification that "Trial license has expired"
• the Application performance report window

Once a trial license expires, Kaspersky Internet Security 2013 need not be removed.

In order to purchase a commercial license for Kaspersky Internet Security 2013, perform the following:

1. Make sure the computer on which Kaspersky Internet Security 2013 is installed should be connected to the Internet.
2. Open the main application window.
3. Click on the Buy Now! button.

The After the Trial page will be opened.

Find Kaspersky Internet Security and select the appropriate options for the license (PC, Year) and then click “Buy Now”.

After that you will be redirected to your Shopping Cart. Follow the instructions and make your purchase.

After your purchase processes you will get an email with an activation code for Kaspersky Internet Security.

You do not need to remove the expired trial version of Kaspersky Internet Security. All you will need to do is activate your Kaspersky Internet Security 2013 using the activation code.