Method 1:
1- Right click on Taskbar
2- Properties
3- Notification area: customize
4- Turn system icons ON or OFF
5- Turn ON Network
6- Go one step back
7- select which icons appear on the taskbar
8- turn Network icon ON
Done!
if network is greyed out follow method 2
Method 2
1.Open Task Manager
2.Locate windows explorer and right click on it and select and "end task" (if there are multiple instances of windows explorer, 3.please "end task" all of them)
4.Click File (top menu) and then Run New Task
type "explorer.exe" without quotes and check the mark against "Create this task with administrative privileges"
Click ok
The WIFI and Network icon should be back now!