Install the drivers from the Intel site. The ones from Microsoft do not come with the control panel.
Link:
https://downloadcenter.intel.com/do...r-for-Windows-10-and-Windows-7-8-1-15-40-?v=t
1. Download the ZIP package
2. Unpack to a folder on desktop
3. Open device manager
4. Expand "Graphics card". Right click on Intel video driver, Update driver, select manual update, select search driver, in location window select "search" and point to the folder on the desktop and then on folder "Graphics". A file should be visible, click it and then OK
5. Let it update (screen flickers, etc this is normal)
6. Voila, tray icon is back
Note, you will need to do this after each official firmware update.