When I joined this forum, I got an email from Bitdefender.It says(my translation to English) something like "Your Bitdefender account email and password are used in other webservices due to a data breach." It is written a service name,though I couldn't find it on Google.I changed my Bitdefender account's password after I saw this message.
Does this email mean that somehow someone stole my email and password from my Pc or is it possible that he stole them from a website which I joined before using same email and password(due to a data breach of that website) ?