I download movies and tv shows (typically .avi format) from torrent web sites, usually only the 'better' ones, like KickAss Torrents...and I review the ratings and comments before selecting the torrent to try to select presumably good ones. I don't download pron (not sure if that matters). When I download the movies, I am always sandboxed (Sandboxie). I recover those .avi's out of my sandbox to a special folder on my "real" hard drive and whenever I play those movies I do so via a sandboxed Windows Media Player or sandboxed VLC. Other than the above, my surfing habits are very conservative and safe...and always sandboxed as well. Questions: Can malware hide in .avi files? If so, how commonplace is it? By asking the question, I'm trying to assess my risk factor. I also have Panda Cloud Anti Virus (free) on my Win7 system and I image it every other week.