Sound problem with UE games

Hi. They’re 3 days that I have problems with playing Fortnite (built with Unreal Engine). The game itself works correctly, but no sound is issued when I play it. Same is on The Joy Of Creation (built with Unreal Engine too). On any other app or program on my computer the sound works correctly, so to be sure i downloaded 6-7 different games, and only on one audio didn’t work, and it was built too with the Unreal Engine. So I concluded that there is a problem on my Notebook (Acer - Windows 10) that doesn’t let me to reproduce audio on games built with UG. Can someone help me pls?