Its been a big week for teen pop singer Avril Levigne, first she garnered five Grammy nominations and now she has a computer virus named after her. A new worm-going by various names, Avril, Lirva and Naith-is infecting machines in the United States and abroad.In addition to forcing users to visit Levigne's web site, the worm continues a recent trend among viruses by attempting to disable various anti-virus and firewall products on infected machines.