Depending on the specific product you have, the activation process for Bitdefender may differ, but in general, it includes the basic process: Install Bitdefender on your computer or device. Start the Bitdefender application. Select the "Activate" tab. Type in the activation code you were given when you bought the item. To finish the activation procedure, click "Activate" or "Next." Before installing Bitdefender, it's essential to check that your device satisfies the system requirements.