Escape key performs a different fucntion

[Microsoft Windows]

I'm using an Asus vivobook s15 laptop. While I was playing a movie, I tried to use the escape to go out from full screen mode I realized it actually stopped the movie instead. after further looking into it i found out the escape now acts as the letter "s" instead. Also I had earlier set my fn key on lock and cant unlock it because the esc key doesn't function. I've tried the Add new keyboard through language settings method but to no avail. Is there a way to restore the key back to normal.

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