There are competing claims for the invention of the first antivirus product.Later email programs, especially Microsoft Outlook Express and Outlook, became vulnerable to viruses embedded in the body of the email itself.Dr. Ahn Chul Su ( Charles Ahn, founder of AhnLab), by late 1990, there were nineteen products separate antiviruses including Norton antivirus, antivirus protection, and McFee free scan.Early computer viruses and countermeasures include Fred Cohen , peter tippet , john mcafee and Ahn Chul Soo.I used antivirus software, but it was updated relatively rarely.