Activating Avast AntiTrack Premium key is really simple, just Download the installation from the following site and proceed according to the on-site instructions.

The key is not working 

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions:

• My key is Duplicated / Already used
• My key is Invalid
• My key is region locked / can't be activated in my country
• My key activated a different product
• My key did not activate all of the content