Hi,
I have tried looking for a solution to this but there all related to Google Chrome

My problem is within every application I have that supports fullscreen

Example:
Google Chrome
Firefox
VLC Media Player
Windows Media Player
Photos
Film and Videos
Steam
*Video Games*

I need help ASAP. I can't go watch YouTube | I can't watch videos | I can't play video games
Without the taskbar watching me

Thanks!

Solution: Taskbar will not hide if any app is in fullscreen mode
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