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