Windows 10: Can't play videos using "Movies & TV" and "Media Player" app.

Whenever I try to open any video any video format like .mp3 , .mp4 .mkv etc., it always results in an error displaying"Windows cannot access the specified device, path or file. You may not have the appropriate permissions to access the file"According to the error, it may seem like I am trying to access an admin-protected file while not being an admin but this is a personal PC and so I would be the admin so this doesn't make sense. How can I fix this?My OS is Windows 10 Pro with OS build : "19045.5854".

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crackling video sound on windws media player and movies&tv apps.

I had windows 10 pro. when I play a video/movie on windows media player and movies%tv app, then the visuals sound is crackling. please give me a solution .

 

Movies & TV and Windows Media Player only play audio for the first few seconds of videos

When I open a video in Movies & TV or Windows Media Player the first few seconds of the video plays only audio with a black screen (on Movies & TV) or only audio and a freeze frame of the video (on Windows Media Player). On Windows Media Player if I set the video to repeat, the freeze frame will be a little shorter on subsequent views. The issue is the worst on MP4s and M4Vs and less pronounced (but still present) with webms. The length of time in which no video is played varies from file to file but each file seems to have a consistent length of time in which it stays frozen. It lasts anywhere from half a second to like 7 seconds.

Watching a video in the Photos program has the same problem. VLC and MPC HD have absolutely no issues.

I've tried:

• repairing and resetting both apps
  
• uninstalling and reinstalling then restarting my PC.
  

 

Movies & TV app

Until today I have been able to play videos from a memory card with the Movies & TV app. Now when I attempt to play one I am asked how I want to open it and Movies & TV is not listed in options. I tried Windows Media player but had no luck. What has changed
and how do I get back to the app (Movies & TV) that was working prior to today?