When you are booting up, you need to hit the F key to throw it to the command menu. I can't remember now which it is, 4,5,6,7,or 8. See if you can get to safe mode that way. If so you should be able to remove the innoculation protection. We had Norton do that once. He found out how to fix it on their site. So check things out there. They have a help section that you can dig up the answer pretty easily.
Norton *IS* the best btw. Just Windows will do some weirdo thing and it appears to the virus prog its an attack. NEVER innoculate from a popup. Run the virus scan and see if it finds a true virus and you won't have that problem.
