Some friends of mine have apparently been victims of a virus hoax. Or maybe not. Someone has started a chain of e-mail which informs people that their computers may be infected with a latent virus, and that a particular file should be deleted. The problem is, the SULFNBK file is part of the Windows system, and may or may not be infected. A lot of people are apparently deleting the file for no good reason. More information on the hoax in this Sophos Article: SULFNBK: Virus or Hoax . . .or both?"