Oh, dear! I'm afraid my brain has become fried in trying to deal with this problem. Please excuse my ignorance, but I must ask you to break down the steps you just enumated even further. I can disable BitDefender, but don't know how to find the HP folder to try the installation again. There are a few HP files in each folder on a couple of places in my computer, but nothing looks like the AO_CDB... one that I've downloaded at least once already. Can you point me to where I might find where that file got placed?
Must get on to other business right now, but hope to hear back from you soon.