click Go to or click on windows sign(don't worry if taskbar is not there then simply press windows sign button)>go to settings then go to system>then tablet mode>check whether it is ON if ON then put OFF for both, that is desktop and taskbar icons Or else click on when I sign in option select automatically to tablet mode. I hope you could have got the solution.
That's it folks.
Taskbar icons disappear and reappear windows 10
Windows 10 taskbar icons disappear and reappear - Best answers
Taskbar disappears and reappears windows 10 - Best answers