So far I have not heard BitDefender say it was a virus. They have indicated that it was a bad virus definition that began when the program did it's autoupdate. For me, this all started about ten minutes till noon yesterday. (BitDefender also recorded the last update at that time I found out later.) Virus started popping up, so it recommend I do a scan. I started the scan and went to lunch. When I got back it had identified over 65,000 infected files and suggested I disinfect them, which I did. Then it said they could not be disinfected and suggested that I quaentine them. But I knew I could not run Windows with half of it's files quarentined, so that was when I started looking online.
Luckily, I had a good Acronis Backup image from about a month ago, and also several incremental backups. Plus, I keep my My documents, and Outlook Personal Folders files all on a separate drive. So, I am good to go. I lost very little. Luckily I was prepared.
As Foghorn Leghorn says:
http://www.mcneel.com/users/jb/foghorn/foghorn7.wav