Double-click the Avast Cleanup Premium icon on your desktop to open the application, then go to Settings (the gear icon).
Select the My subscription tab, then click the My subscription button.
Click Enter activation code.
Click the text box below to copy your activation code, paste it directly into the application by pressing the Ctrl and V keys simultaneously, then click Enter.
See detailed activation instructions
Type the activation code you received with the product into the text box, and click Enter(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the application, double-click the Avast Cleanup Premium icon on your desktop.