Activating Avast SecureLine VPN key is really simple, just follow these steps: 

1. Download and install the software available on this site.
2. Launch the software and click on Menu
3. Move to the My licenses tab and on Subscription screen. 
4. Click Activate

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