It might not hurt to check
http://www.sarc.com/ which is Symantec (Norton's) Security response (aka) Virus info. area. Sometimes it's required to figure out what the virus is, use a clean comp to download a fixit file that runs from a boot disk, then use it according to their instructions. This especially tends to hold to this stuff that is smart enough to shut down antivirus programs. They have an area there called removal tools, (If they have what you need.... ) --Good Luck