Online Armor AV+ is exactly the same as Online Armor, except it contains the Kaspersky Lab antivirus engine. This is used to check unknown programs before they run on your computer to make sure that they don't contain viruses.
When running AV+ you get all of the powerful features of Online Armor, plus the excellent Kaspersky engine to check files before they run (and emails as they arrive) for virus code.
If you aren't running an antivirus program, Online Armor AV+ is for you.
