Start the program on your PC and go to the “menu” option available at the top right corner of the window. Now select the “My licenses” option from the drop-down menu below. You will now see a window with the subscription details along with the activation status. Now, there is a “Buy now” option available on the right corner of the screen. Besides which an arrow button is located. Click on that arrow button. After this, your Avast cleanup activation code will be displayed on the screen. Copy it and use the code to activate your program.