Virus Total is the best, in our opinion because:

  1. It uses the Windows version of the AVs so avast has more unpackers for windows and that is the version most are using.
  2. There are 27 different scanning engines greater than the others.
  3. It also has an email submission option for periods when they are busy and you get a reply.
  4. It can cue the submission and you can carry on browsing and you will eventually (not to long) get your result displayed.