If you've been using McFee & Norton together, THATS how a virus has got you.
2 av programs running at the same time causes Probs, or do you have 3 Windows security Centre, also turned on. No surely not!!!!
Did you Password protect the back doors to your AV program's,
of corse you did.
So it cant be a VIRUS! can it.
HEY WAKE UP LISTERN TO THE EXPERTS YOU HAVE A VIRUS.
ASK politely you will get help.
Peace.