Question icons of running applications in the right corner of the start menu disappeared

[TransCP6]

I don't know what it's called. Below I will give a screenshot. I don't know if an update or a virus did it, but the cmd commands didn't help (SFC, DISM).

 

[Ralston18]

Right click a blank area in the bar.

There should be two menu options: Task Manager and Taskbar settings.

First explore the settings, make notes, and then go back and try changes that seem applicable.

Change only one thing at a time being sure to again note what was changed in case you need to undo something.

Perhaps "Other system tray icons".