Why does the volume itself decrease on a Dell laptop?

Question

Dell

I have a Dell Inspiron-17 7332 2 in 1 laptop
A couple of days ago I had a problem. The sound itself is reduced to "0". To listen to something, you have to press Fn + F3 (tobish to increase the volume). The volume icon is permanently lit in the upper left corner.
Plus, if YouTube video is enabled or on another site, then a plate with a media player hangs in the upper left corner (picture 1).



Also, such a symptom appeared that when, for example, working in a video editor, I open the browser (I click on the icon on the taskbar), the browser window does not jump to the foreground, but blinks down there, they say I opened in the background ... I am

attaching a gif with the one how the volume works: I increase it, and it falls down ...



All the latest drivers are installed.

Answer 1

https://www.dell.com/community/Laptops-General-Rea...