Yes I downloaded it from a official site and yes I do update my definitions daily. I am very careful about my security I have one PC that I only use for business and another that I surf with.
I think I have some bad CD's because I keep getting bad format errors when I try to burn a Lenox ISO disk. I was trying to see if I had better luck with a different machine when I discovered the Anti Virus warning message. I did see that older versions had the false positive messages so I was just checking to see if it was a possible problem with the latest version.