can't play

  1. C

    Unable to play ANY media

    I've an HP-500f running Win 7 service pack 1. I am unable to play *any* videos (MP4), .mp3, or .flv files with *any* of the media programs I've got, which includes: Windows Media Player; VLC Media Player; GOM Player; and RealPlayer Cloud. The error message I get with .MP4s with each of the...