How to activate a Bitdefender key?

Activating Bitdefender Antivirus Plus key is really simple, just follow those steps:  

1. Visit the following site www.central.bitdefender.com
2. Register or Log into your Bitdefender account.
3. Click on My Subscription tab on the left.
4. Press on the Activation Code button in upper-right corner and put your code in. 

For mobile version

1. Go to: https://central.bitdefender.com
2. Sign in to your Bitdefender account.
3. Tap the icon in the upper-left corner of the screen, then select My Devices.
4. In the MY DEVICES window, tap the + icon.
5. Select Bitdefender Mobile Security from the list, then tap GO TO GOOGLE PLAY.
6. Tap INSTALL in the Google Play screen.

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 did not activate all of the content   
• My key does not work. What should I do?