Except for firmware viruses. And that's assuming it's not a regular polymorphic virus, which is harder for a simple virus scanner to detect correctly. http://w

Except for firmware viruses. And that's assuming it's not a regular polymorphic virus, which is harder for a simple virus scanner to detect correctly. http://www.wired.com/2015/02/nsa-firmware-hacking/ http://www.wired.com/2015/02/nsa-firmware-hacking/