The top row of my keys isn't working from my mute button to my delete button, how do I fix this?

[Jocelyn A]

I saw a previous post similar to this, but all the solutions given to the other person didn't work. When I press Fn plus any of the other function keys, the function still doesn't happen. Whenever I press the mute button, it opens up new Microsoft tab, whenever I try to increase the volume a weird search bar pops up and it's really frustrating. When I try to press the button that lights up the whole keyboard it reloads the whole browser. I have tried troubleshooting through settings and updating and restarting my device, to no avail.

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