Download and run the Avast Cleanup Premium setup file.
Run the downloaded setup file and click Yes in the User Account Control dialog.
Select the language you want to use, then click OK.
Review the file's location, then click Next.
Click Install and then Finish.
When the program is successfully installed, the Cleanup Premium interface opens.
Open the Avast Cleanup Premium menu.
Click on Subscription.
Enter the provided activation code.