How to activate a Bitdefender subscription 1. Log in to your Bitdefender Central account at https://central.bitdefender.com/. If you don’t have an account, choose to create one. 2. If you don’t have any active subscriptions in your Bitdefender Central account, as soon as you sign in you will be prompted to either activate your new subscription or to buy Bitdefender. Click ACTIVATE YOUR SUBSCRI...