Taskbar is still visible when in fullscreen mode of video player or streaming

[rald]

I don't know what happened to my Windows 10
Sometimes the taskbar was still visible when I enter full screen mode in the video player or streaming
Here is the screenshot :

Please explain to me whats wrong with it, what happen, and what should i do to solve it

 

[Rapaaja]

HI Unlock the desktop or https://support.microsoft.com/en-us/help/929833/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system

 

[rald]

HI Unlock the desktop or https://support.microsoft.com/en-us/help/929833/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system

I was try the steps, and got this message
"Windows Resource Protection did not find any integrity violations."
This message there is not in the list of step number 4

What should i do now ?

 

[Rapaaja]

HI Win Help : https://support.microsoft.com/en-us/help/29280

I hope this helps you Rapaaja