After the Trial FAQ
Are you happy with your trial version?
If so, you can now simply purchase an activation code that will turn your trial version into a fully functional security solution.
To do this, run your Kaspersky Lab program and then click the “Buy Now” button in the top right-hand corner of the window. You will be taken to a dedicated web page where you can purchase an activation code for your product, which will be sent to you via email after you have completed your online purchase.
You should then add this activation code to your Kaspersky Lab product to complete the process.
To find out more details please read the manuals: