Here is what you should do to find the product key:

1. Look inside the packaging of the computer or software for a product key. Each product key is uniquely generated for one particular installation only.
2. Check the email associated with your account, since product keys may have been sent via email.
3. If the product key is not available in the email, log in to your associated account again and check if the product key is available in the order history.
4. If all of the above steps fail, contact the manufacturer for help in retrieving the product key.