Please proceed as follows to carry out a product upgrade from Avira Antivirus Premium to Avira Internet Security:

1. Open our website and click on For Home
2. On For Home select Avira Internet Security
3. On the next page you can select your license model (duration and number of computers)
   
   
    
4. Clicking on the Buy button will take you to the checkout page
5. Fill out all the required fields
6. Once you have completed the purchase and your payment has been received by Cleverbridge Inc., you will receive your activation code via email for the new license
7. Open the Avira Control Center on your existing (already installed) Avira product
8. On the drop-down menu, select Help → License management
   
   
    
9. Enter the received activation code at Activate product and click on Next
   
   

The upgrade process has now started and all you have to do now is to follow the instructions on your screen.