So I did your steps now in the file path:
there is a file named '*' with "deb http://download.bitdefender.com/repos/deb/ bitdefender non-free" in it.
Before we proceed any further I was thinking maybe BitDefender doesnt work with Lubuntu?
Anyway my goal now is not to get BitDefender working but just to be able to open up my Synaptic Package Manager and make the Red/white error Circle in the task bar go away without having to reinstall Lubuntu. Also if you know of any easy to install antiviruses that would be great to.