The icons in Task Bar are usually shown the programs pinned. But recently, the icons are not showing up. Sometimes, icons are shown after a restart. Then again, next time icons get disappear.
dism /online /cleanup-image /restorehealth in CMD ( Command Prompt ).
It did not work.
~ Strange Behaviour noticed!
This is how the taskbar looks initially on a fresh start of OS.
Now, open Google Chrome.
Right click on Google Chrome icon and select 'Unpin from taskbar'.
Surprise! all tray icons are visible now. But then, after Re-start gone.