1.    12 Oct 2017 #1
    Join Date : Nov 2015
    Posts : 3
    Win10 Pro x64

    Can not play .mp4 or .m4v files since Update to 1709


    Tried Update from existing 1703 and all is working. But after clean install no player works with .mp4 files, even I installed the same codec package. Anybody the same problem or knows a solution?
      My ComputerSystem Spec
  2.    13 Oct 2017 #2
    Join Date : Mar 2015
    New Mexico
    Posts : 1,327
    Windows 10 Pro,

    No. I am using 1709 without any problems. Do some scans of your system. sfc /scannow
      My ComputerSystem Spec
  3.    13 Oct 2017 #3
    Join Date : Dec 2016
    Posts : 158
    Win 10 rs1 - build 14393.1794

    Have you tried running Windows Update - you may need some updates (drivers) which Microsoft will provide for
    your PC? After that, try to right-click on a media file and select "Open with" then open with Windows Media Player.
      My ComputerSystem Spec
  4.    13 Oct 2017 #4
    Join Date : Jun 2017
    Posts : 114
    10 Pro 16299.15 64 Bit

    Quote Originally Posted by Gordon7 View Post
    Have you tried running Windows Update - you may need some updates (drivers) which Microsoft will provide for
    your PC? After that, try to right-click on a media file and select "Open with" then open with Windows Media Player.
    no those two files should play right out of the gate on any version of 10. i agree with doing the sfc.
      My ComputerSystem Spec
  5.    13 Oct 2017 #5
    Join Date : Mar 2015
    Philadelphia
    Posts : 1,174
    Windows 10 Pro x64

    I would blame the codec pack, since both file types should play without any extra additions. If not, skip the codecs and get VLC.
      My ComputerSystem Spec
  6.    13 Oct 2017 #6
    Join Date : Nov 2015
    Posts : 3
    Win10 Pro x64
    Thread Starter

    thx for the replies. For now I restored my updated Win10 Fall Creators Update and will wait for the new Isos to download, before I try a clean install again. If I run into the same problem again I will try sfc scannow.
    Thx again.
      My ComputerSystem Spec
  7.    13 Oct 2017 #7
    Join Date : Jun 2014
    USA
    Posts : 1,577
    Windows 10 Pro x64

    Like everyone said, those file should play without issue. With that you might check the files themselves, or look elsewhere because there's definitely support for mp4's right out the box in Windows 10.
      My ComputersSystem Spec
  8.    13 Oct 2017 #8
    Join Date : Oct 2014
    Trnava
    Posts : 2,863
    Windows 10.4 Home 1709 x64

    mp4 is just a container use this tool to check, what codec is used:

    MediaInfo - Download MediaInfo for Microsoft Windows
      My ComputerSystem Spec
  9.    13 Oct 2017 #9
    Join Date : Nov 2015
    Posts : 3
    Win10 Pro x64
    Thread Starter

    Problem solved.
    It was a corrupted 387.92-desktop-win10-64bit-international-whql graphic card driver.
    I installed an older version and everything was working fine. Then I installed a fresh downloaded
    387.92-desktop-win10-64bit-international-whql.
    Everything ok.
      My ComputerSystem Spec
  10.    14 Oct 2017 #10
    Join Date : Jun 2014
    USA
    Posts : 1,577
    Windows 10 Pro x64

    There you go. Knew it wasn't Windows

    Happy you got it solved.
      My ComputersSystem Spec

 


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