Can A Video File Contain A Virus?
http://www.opswat.com/blog/can-video-file-contain-virus

When Software Collides! What to do with your old antivirus program.
https://blog.avast.com/2014/05/09/when-software-collides-what-to-do-with-your-old-antivirus-program/

Why Using Multiple Antivirus Programs is a Bad Idea
http://blog.kaspersky.com/multiple-antivirus-programs-bad-idea/

quietman7
http://www.bleepingcomputer.com/forums/t/186533/is-it-bad-to-run-multiple-antivirus-programs/?p=1046121